logomachy (n.) Look up logomachy at Dictionary.com
"contention about, or with, words," 1560s, from logo- + -machy.
logon Look up logon at Dictionary.com
in computer sense, as one word, by 1975, from log (v.) + on.
logorrhea (n.) Look up logorrhea at Dictionary.com
1878, from logos + ending from diarrhea.
logos (n.) Look up logos at Dictionary.com
1580s, Logos, "the divine Word, second person of the Christian Trinity," from Greek logos "word, speech, discourse," also "reason," from PIE root *leg- (1) "to collect" (with derivatives meaning "to speak," on notion of "to pick out words;" see lecture (n.)); used by Neo-Platonists in various metaphysical and theological senses and picked up by New Testament writers.

Other English formations from logos include logolatry "worship of words, unreasonable regard for words or verbal truth" (1810 in Coleridge); logomania (1870); logophobia (1923).
logrolling (n.) Look up logrolling at Dictionary.com
also log-rolling, in the legislative vote-trading sense, 1823, American English, from the notion of neighbors on the frontier helping one another with the heavy work of clearing land and building cabins (as in phrase you roll my log and I'll roll yours); see log (n.1) + rolling.
LOG-ROLLING. 1. In the lumber regions of Maine it is customary for men of different logging camps to appoint days for helping each other in rolling the logs to the river, after they are felled and trimmed -- this rolling being about the hardest work incident to the business. Thus the men of three or four camps will unite, say on Monday, to roll for camp No. 1, -- on Tuesday for camp No. 2, -- on Wednesday for camp No. 3, -- and so on, through the whole number of camps within convenient distance of each other. [Bartlett]
logy (adj.) Look up logy at Dictionary.com
"dull and heavy," 1848, American English, perhaps from Dutch log "heavy, dull" + -y (2); compare Middle Low German luggich "sleepy, sluggish." Or perhaps a variant of loggy.
loimic (adj.) Look up loimic at Dictionary.com
"pertaining to plague," 1822, from Greek loimikos, from loimos "plague, pestilence."
loin (n.) Look up loin at Dictionary.com
early 14c., "side of the body of an animal used for food," from Old French loigne "hip, haunch, lumbar region," from Vulgar Latin *lumbea, from *lumbea caro "meat of the loin," from fem. of *lumbeus, adjective used as a noun, from Latin lumbus "loin" (see lumbago).

Replaced Old English lendenu "loins," from Proto-Germanic *landwin- (source also of German Lende "loin," Lenden "loins;" Old High German lenti, Old Saxon lendin, Middle Dutch lendine, Dutch lende, Old Norse lend).

The Latin word perhaps was borrowed from a Germanic source. In reference to the living human body, it is attested from late 14c. In Biblical translations, often used for "that part of the body that should be covered and about which the clothes are bound" (1520s). Related: Loins.
loincloth (n.) Look up loincloth at Dictionary.com
1859, from loin + cloth.
loiter (v.) Look up loiter at Dictionary.com
early 15c., "idle one's time, dawdle over work," from Middle Dutch loteren "be loose or erratic, shake, totter" like a loose tooth or a sail in a storm; in modern Dutch, leuteren "to delay, linger, loiter over one's work." Probably cognate with Old English lutian "lurk," and related to Old English loddere "beggar;" Old High German lotar "empty, vain," luzen "lurk;" German Lotterbube "vagabond, rascal," lauschen "eavesdrop;" Gothic luton "mislead;" Old English lyðre "base, bad, wicked." Related: Loitered; loitering.
loitering (n.) Look up loitering at Dictionary.com
mid-14c., verbal noun from loiter.
lol Look up lol at Dictionary.com
by 1993, computer chat abbreviation of laughing out loud.
Lola Look up Lola at Dictionary.com
fem. proper name, diminutive of Spanish Dolores.
Lolita Look up Lolita at Dictionary.com
fem. proper name, diminutive of Lola. Title and name of character in the 1958 novel by Vladimir Nabokov (1899-1977) about a precocious schoolgirl seduced by an older man; by 1960 the name was in widespread figurative use.
loll (v.) Look up loll at Dictionary.com
mid-14c., lollen "to lounge idly, hang loosely," perhaps related to Middle Dutch lollen "to doze, mumble," or somehow imitative of rocking or swinging. Specifically of the tongue from 1610s. Related: Lolled; lolling. As a noun, from 1709. Grose ["Dictionary of the Vulgar Tongue," 1785] has lollpoop "A lazy, idle drone."
lollapalooza (n.) Look up lollapalooza at Dictionary.com
also lallapaloosa, lallapalootza, etc.; "remarkable or wonderful person or thing," 1901, American English, fanciful formation. The annual North American alternative pop music concert of the same name dates from 1991.
Lollard Look up Lollard at Dictionary.com
name for certain heretics, late 14c. (in Chaucer, Loller, c. 1386), from Middle Dutch lollaerd, applied pejoratively to members of reforming sects c. 1300 who devoted themselves to the care of the sick and poor, literally "mumbler, mutterer," so called by critics who regarded them as heretics pretending to humble piety, from lollen "to mumble or doze." Generic late Middle English term for groups suspected of heresy, especially followers of John Wyclif.
lollipop (n.) Look up lollipop at Dictionary.com
1784, lolly-pops "sweetmeats, soft candy," perhaps related to loll "to dangle" (the tongue) + pop "strike, slap." Or the first element may be northern dialectal lolly "the tongue." Meaning "hard candy on a stick" is from 1920s.
lolly (n.) Look up lolly at Dictionary.com
1854, short for lollipop. In 20c. British slang, also "money."
lollygag (v.) Look up lollygag at Dictionary.com
"dawdle, dally," 1862, lallygag, American English, perhaps from dialectal lolly "tongue" + gag "deceive, trick." Related: Lollygagged; lollygagging.
Lombard (n.) Look up Lombard at Dictionary.com
from Late Latin Langobardus, proper name of a Germanic people who originated in Scandinavia, migrated to the Elbe area 1 c. C.E., then to Pannonia (5 c.) and in 6 c. conquered northern Italy and settling in the northern region that became known as Lombardy, ruling for two centuries. Their name is from Proto-Germanic Langgobardoz, often said to mean literally "Long-beards," but perhaps rather from *lang- "tall, long" + the proper name of the people (Latin Bardi). Their name in Old English was Langbeardas (plural), but also Heaðobeardan, from heaðo "war."

In Middle English the word meant "banker, money-changer, pawnbroker" (late 14c.), from Old French Lombart "Lombard," also "money-changer; usurer; coward," from Italian Lombardo (from Medieval Latin Lombardus). Lombards in Middle Ages were notable throughout Western Europe as bankers and money-lenders, also pawn-brokers; they established themselves in France from 13c., especially in Montpellier and Cahors, and London's Lombard Street (c. 1200) originally was the site of the houses of Lombard bankers. French also gave the word in this sense to Middle Dutch and Low German. Lombardy poplar, originally from Italy but planted in North American colonies as an ornamental tree, is attested from 1766.
Lombardic Look up Lombardic at Dictionary.com
1690s, from Lombard + -ic.
London Look up London at Dictionary.com
chief city and capital of England, Latin Londinium (c.115), often explained as "place belonging to a man named Londinos," a supposed Celtic personal name meaning "the wild one," "but this etymology is rejected in an emphatic footnote in Jackson 1953 (p.308), and we have as yet nothing to put in its place" [Margaret Gelling, "Signposts to the Past: Place-Names and the History of England," Chichester, 1978]. London Bridge the children's singing game is attested from 1827. London broil "large flank steak broiled then cut in thin slices" attested by 1939, American English; London fog first attested 1830.
Londoner (n.) Look up Londoner at Dictionary.com
"resident or native of London," mid-15c., from London + -er (1). Earlier (late 14c.) was Anglo-French Londenois.
lone (adj.) Look up lone at Dictionary.com
late 14c., "having no companion, solitary," shortening of alone (q.v.) by weakening of stress or else by misdivision of what is properly all one. The Lone Star in reference to "Texas" is first recorded 1843, from its flag. Lone wolf in the figurative sense is 1909, American English.
loneliness (n.) Look up loneliness at Dictionary.com
1580s, from lonely + -ness.
lonely (adj.) Look up lonely at Dictionary.com
c. 1600, "solitary, lone," from lone + -ly (1). Meaning "dejected for want of company" is from 1811. Lonely heart (n.) "a lonely-hearted person" is from 1922. Lonely hearted (adj.) is attested from 1820.
loner (n.) Look up loner at Dictionary.com
"one who avoids company," 1946; see lone. Apparently first in U.S. baseball slang (earliest reference is to Ted Williams).
Ted is likable enough in spite of his obsession with his specialty. He is something of a "loner," and he refuses to pal around with his teammates in off hours, but in the clubhouse he does his share of the talking. ["Life" magazine, Sept. 23, 1946]
lonesome (adj.) Look up lonesome at Dictionary.com
1640s, from lone + -some (1). Related: Lonesomeness.
long (adj.) Look up long at Dictionary.com
"that extends considerably from end to end," Old English lang "long," from Proto-Germanic *langgaz (source also of Old Frisian and Old Saxon lang, Old High German and German lang, Old Norse langr, Middle Dutch lanc, Dutch lang, Gothic laggs "long").

The Germanic words are perhaps from PIE *dlonghos- (source also of Latin longus, Old Persian darga-, Persian dirang, Sanskrit dirghah, Greek dolikhos "long," Greek endelekhes "perpetual," Latin indulgere "to indulge"), from root *del- "long."

The adverb is from Old English lange, longe, from the adjective. No longer "not as formerly" is from c. 1300; to be not long for this world "soon to die" is from 1714.

The word illustrates the Old English tendency for short "a" to become short "o" before -n- (also retained in bond/band and West Midlands dialectal lond from land and hond from hand).

Long vowels (c. 1000) originally were pronounced for an extended time. Sporting long ball is from 1744, originally in cricket. Long jump as a sporting event is attested from 1864. A ship's long-boat so called from 1510s. Long knives, name Native Americans gave to white settlers (originally in Virginia/Kentucky) is from 1774. Long in the tooth (1841 of persons) is from horses showing age by recession of gums. Long time no see, imitative of American Indian speech, is first recorded 1900. To be long on something, "have a lot" of it, is from 1900, American English slang.
long (v.) Look up long at Dictionary.com
Old English langian "to yearn after, grieve for," literally "to grow long, lengthen," from Proto-Germanic *langojanan (see long (adj.)). Cognate with Old Norse langa, Old Saxon langon, Middle Dutch langhen, Old High German langen "to long," German verlangen "to desire." Related: Longed; longing.
long johns (n.) Look up long johns at Dictionary.com
type of warm underwear, 1943, originally for U.S. GIs. By 1919 as a type of pastry. Long john also was used of various sorts of worm, potato, sled, etc.
long pig (n.) Look up long pig at Dictionary.com
"human being eaten as food," 1848, in a Pacific Islander context:
Bau literally stank for many days, human flesh having been cooked in every house, and the entrails thrown outside as food for pigs, or left to putrefy in the sun. The Somosomo people were fed with human flesh during their stay at Bau, they being on a visit at that time; and some of the Chiefs of other towns, when bringing their food, carried a cooked human being on one shoulder, and a pig on the other; but they always preferred the "long pig," as they call a man when baked. ["FEEJEE.--Extract of a Letter from the Rev. John Watsford, dated Ono, October 6th, 1846." in "Wesleyan Missionary Notices," Sept. 1847]
long run (n.) Look up long run at Dictionary.com
also long-run, "ultimate outcome," 1620s, from long (adj.) + run (n.), on notion of "when events have run their course." As an adjective from 1804.
long shot (n.) Look up long shot at Dictionary.com
in the figurative sense of "something unlikely," 1867, from long (adj.) + shot (n.). The notion is of a shot at a target from a great distance, thus difficult to make. Cinematic sense is from 1922.
long-ago (adj.) Look up long-ago at Dictionary.com
1834, from long (adj.) + ago.
long-distance (adj.) Look up long-distance at Dictionary.com
1884, in reference to telephoning, from long (adj.) + distance (n.).
long-headed (adj.) Look up long-headed at Dictionary.com
"discerning," c. 1700, from long (adj.) + head (n.).
long-lived (adj.) Look up long-lived at Dictionary.com
early 15c., from long (adj.) + past participle of live (v.). Old English had langlife "long-lived."
long-playing (adj.) Look up long-playing at Dictionary.com
1910, of recordings, from long (adj.) + present participle of play (v.).
long-running (adj.) Look up long-running at Dictionary.com
1943, of theatrical productions, from long (adj.) + running.
long-suffering Look up long-suffering at Dictionary.com
also longsuffering, 1520s (n.), 1530s (adj.), from long (adj.) + suffering (see suffer). Old English had langmodig in this sense.
long-term (adj.) Look up long-term at Dictionary.com
also longterm, long term, 1876, originally in insurance, from long (adj.) + term (n.).
long-winded (adj.) Look up long-winded at Dictionary.com
also longwinded, 1580s, "given to lengthy speeches," from long (adj.) + adjective from wind (n.1) in the secondary Middle English sense "breath in speaking" (early 14c.).
longanimity (n.) Look up longanimity at Dictionary.com
"patience," mid-15c., from Late Latin longanimitas "long-suffering, patient," from longanimus, from longus (see long (adj.)) + animus "soul, spirit, mind" (see animus).
longbow (n.) Look up longbow at Dictionary.com
also long-bow, the characteristic medieval English weapon, c. 1500, from long (adj.) + bow (n.1).
longeron (n.) Look up longeron at Dictionary.com
1912, from French longeron, from longer "to skirt, extend along," from allonger "to lengthen" (see lunge).
longevity (n.) Look up longevity at Dictionary.com
1610s, from Late Latin longaevitatem (nominative longaevitas) "great age, long life," from Latin longaevus "long-lived," from longus (see long (adj.)) + aevum "lifetime, age" (see eon).
longhair (n.) Look up longhair at Dictionary.com
also long-hair, "cat with long hair," 1893, from long (adj.) + hair. As "intellectual," especially in musical tastes, "devotee of classical music," 1920. Sense of "hippie" attested from 1969.
longhand (adj.) Look up longhand at Dictionary.com
also long-hand, of handwriting, 1660s, from long (adj.) + hand (n.).