hologram (n.) Look up hologram at Dictionary.com
1949, coined by Hungarian-born British scientist Dennis Gabor (Gábor Dénes), 1971 Nobel prize winner in physics for his work in holography; from Greek holos "whole" (in sense of three-dimensional; see safe (adj.)) + -gram.
holograph (n.) Look up holograph at Dictionary.com
"document written entirely by the person from whom it proceeds," 1620s, from Late Latin holographus, from Greek holographos "written entirely by the same hand," literally "written in full," from holos "whole" (see safe (adj.)) + graphos "written," from graphein "to write" (see -graphy). Modern use, with reference to holograms, is a 1960s back-formation from holography.
holographic (adj.) Look up holographic at Dictionary.com
early 18c., of writing, from holograph + -ic; physics sense is from 1964 (see holography).
holography (n.) Look up holography at Dictionary.com
early 19c., of writing, from holograph + -y (4); physics sense, "process of using holograms," is from 1964, coined by discoverer, Hungarian-born physicist Gábor Dénes (1900-1979), from hologram on analogy of telegraphy/telegram.
holomorphic (adj.) Look up holomorphic at Dictionary.com
1880, from holo- + morphic (see metamorphosis).
holophrastic (adj.) Look up holophrastic at Dictionary.com
1837, from holo- + Greek phrastikos, from phrazein "to indicate, tell, express" (see phrase (n.)).
Holstein Look up Holstein at Dictionary.com
breed of cattle, 1865; so called because originally raised in nearby Friesland. The place name is literally "woodland settlers," from the roots of German Holz "wood" (see holt) and siedeln "to settle," altered by influence of Stein "stone." Since 15c. it has been united with the Duchy of Schleswig.
holster (n.) Look up holster at Dictionary.com
"leather case for a pistol," 1660s, probably from Old English heolster, earlier helustr "concealment, hiding place," from Proto-Germanic *hulfti- (cognates: Old High German hulft "cover, case, sheath," Old Norse hulstr "case, sheath," Middle Dutch holster, German Halfter "holster"), from PIE *kel- (2) "to cover, to hide" (see cell). Intermediate forms are wanting, and the modern word could as well be from the Norse or Dutch cognates.
holster (v.) Look up holster at Dictionary.com
by 1902, from holster (n.). Related: Holstered; holstering.
holt (n.) Look up holt at Dictionary.com
Old English holt "woods," common in place names, from Proto-Germanic *hultam- (cognates: Old Frisian, Old Norse, Middle Dutch holt, Dutch hout, German Holz "wood"), from PIE *kldo- (cognates: Old Church Slavonic klada "beam, timber," Greek klados "twig," Old Irish caill "wood"), from root *kel- (1) "to strike, cut."
holy (adj.) Look up holy at Dictionary.com
Old English halig "holy, consecrated, sacred, godly," from Proto-Germanic *hailaga- (cognates: Old Norse heilagr, Old Frisian helich "holy," Old Saxon helag, Middle Dutch helich, Old High German heilag, German heilig, Gothic hailags "holy"). Adopted at conversion for Latin sanctus.

Primary (pre-Christian) meaning is not possible to determine, but probably it was "that must be preserved whole or intact, that cannot be transgressed or violated," and connected with Old English hal (see health) and Old High German heil "health, happiness, good luck" (source of the German salutation Heil). Holy water was in Old English. Holy has been used as an intensifying word from 1837; used in expletives since 1880s (such as holy smoke, 1883, holy mackerel, 1876, holy cow, 1914, holy moly etc.), most of them euphemisms for holy Christ or holy Moses.
Holy Land Look up Holy Land at Dictionary.com
"western Palestine, Judaea," late 13c., translating Medieval Latin terra sancta (11c.).
holystone (n.) Look up holystone at Dictionary.com
soft sandstone used to scrub decks of sailing ships, 1777, despite the spelling, so called perhaps because it is full of holes. As a verb, by 1828.
homage (n.) Look up homage at Dictionary.com
late 13c., from Old French homage (12c., Modern French hommage) "allegiance or respect for one's feudal lord," from homme "man," from Latin homo (genitive hominis) "man" (see homunculus). Figurative sense of "reverence, honor shown" is from late 14c. As a verb, from 1590s (agent noun homager is from c. 1400).
hombre (n.) Look up hombre at Dictionary.com
"a man" (especially one of Spanish descent), 1846, from Spanish, from Latin hominem, accusative of homo "man" (see homunculus).
homburg (n.) Look up homburg at Dictionary.com
type of soft felt hat with a curled brim and a dented crown, 1894, from Homburg, resort town in Prussia, where it was first made. Introduced to England by Edward VII.
home (n.) Look up home at Dictionary.com
Old English ham "dwelling, house, estate, village," from Proto-Germanic *haimaz "home" (cognates: Old Frisian hem "home, village," Old Norse heimr "residence, world," heima "home," Danish hjem, Middle Dutch heem, German heim "home," Gothic haims "village"), from PIE *(t)koimo-, suffixed form of root *tkei- "to settle, dwell, be home" (cognates: Sanskrit kseti "abides, dwells," Armenian shen "inhabited," Greek kome, Lithuanian kaimas "village;" Old Church Slavonic semija "domestic servants").
'Home' in the full range and feeling of [Modern English] home is a conception that belongs distinctively to the word home and some of its Gmc. cognates and is not covered by any single word in most of the IE languages. [Buck]
Home stretch (1841) is originally a reference from horse racing. Home base in baseball attested by 1859 (home plate by 1867; home as the goal in a sport or game is from 1778). Home economics first attested 1899. Slang phrase make (oneself) at home "become comfortable in a place one does not live" dates from 1892. To keep the home fires burning is from a song title from 1914. To be nothing to write home about "unremarkable" is from 1907. Home movie is from 1919; home computer is from 1967.
home (v.) Look up home at Dictionary.com
1765, "to go home," from home (n.). Meaning "be guided to a destination by radio signals, etc." (of missiles, aircraft, etc.) is from 1920; it had been used earlier in reference to pigeons (1862). Related: Homed; homing. Old English had hamian "to establish in a home."
home front (n.) Look up home front at Dictionary.com
also homefront, 1918, from home (n.) + front (n.) in the military sense. A term from World War I; popularized (if not coined) by the agencies running the U.S. propaganda effort.
The battle front in Europe is not the only American front. There is a home front, and our people at home should be as patriotic as our men in uniform in foreign lands. [promotion for the Fourth Liberty Loan appearing in various U.S. magazines, fall 1918]
home page (n.) Look up home page at Dictionary.com
also homepage, 1993, from home (n.) + page (n.).
home rule (n.) Look up home rule at Dictionary.com
1860, originally in reference to Ireland, from home (n.) + rule (n.).
home run (n.) Look up home run at Dictionary.com
1856, from home (n.) + run (n.).
homebody (n.) Look up homebody at Dictionary.com
1821, from home (n.) + body.
homebound (adj.) Look up homebound at Dictionary.com
1882, from home (n.) + bound (adj.2).
homeboy (n.) Look up homeboy at Dictionary.com
"person from one's hometown," 1940s, American English, black slang, also originally with overtones of "simpleton." With many variants (compare homebuddy, homeslice, both 1980s, with meaning shading toward "good friend"). The word had been used by Ruskin (1886) with the sense "stay-at-home male," and it was Canadian slang for "boy brought up in an orphanage or other institution" (1913).
homecoming (n.) Look up homecoming at Dictionary.com
mid-13c. in literal sense of "a coming home," from home (n.) + present participle of come. Compare Old English hamcyme "return." Attested from 1935 in U.S. high school dance sense. Used earlier in Britain in reference to the annual return of natives to the Isle of Man.
homeland (n.) Look up homeland at Dictionary.com
1660s, from home (n.) + land (n.). Old English hamland meant "enclosed pasture."
homeless (adj.) Look up homeless at Dictionary.com
1610s, from home (n.) + -less. Old English had hamleas, but the modern word probably is a new formation. As a noun meaning "homeless persons," by 1857.
homelessness (n.) Look up homelessness at Dictionary.com
1814, from homeless + -ness.
homeliness (n.) Look up homeliness at Dictionary.com
mid-14c., from homely + -ness. Originally "meekness, gentleness," also "familiarity, intimacy; friendliness;" sense degenerated by c. 1400 to "want of refinement in manners, coarseness; presumptuousness."
homely (adj.) Look up homely at Dictionary.com
late 14c., "of or belonging to home or household, domestic," from Middle English hom "home" (see home (n.)) + -ly (2). Sense of "plain, unadorned, simple" is late 14c., and extension to "having a plain appearance, ugly, crude" took place c. 1400, but now survives chiefly in U.S., especially in New England, where it was the usual term for "physically unattractive;" ugly being typically "ill-tempered."
homemade (adj.) Look up homemade at Dictionary.com
also home-made, 1650s, from home (n.) + made.
homemaker (n.) Look up homemaker at Dictionary.com
also home-maker, "woman considered as a domestic agent," by 1861, American English, from home (n.) + agent noun from make (v.).
homeo- Look up homeo- at Dictionary.com
word-forming element meaning "similar to," Latinized from Greek homio-, from homoios "like, resembling, of the same kind," related to or an expanded form of homos "one and the same," from PIE *sem- "one, as one" (see same).
homeomorphism (n.) Look up homeomorphism at Dictionary.com
1854, from homeomorphous (1832), from homeo- + morphous (see metamorphosis); originally of crystals. Homeomorphic is from 1902.
homeopath (n.) Look up homeopath at Dictionary.com
1830; back-formation from homeopathy. Related: Homeopathic.
homeopathy (n.) Look up homeopathy at Dictionary.com
1830, from German Homöopathie, coined 1824 by German physician Samuel Friedrich Hahnemann (1755-1843) from Greek homoios "like, similar, of the same kind" (see homeo-) + -patheia (see -pathy).
homeostasis (n.) Look up homeostasis at Dictionary.com
1926, from homeo- + Greek stasis "standing still" (see stasis). Related: Homeostatic.
homeowner (n.) Look up homeowner at Dictionary.com
also home-owner, 1892, American English, from home (n.) + agent noun of own (v.).
Homer Look up Homer at Dictionary.com
traditional name of the author of the "Iliad" and the "Odyssey," from Latin Homerus, from Greek Homeros. The name first occurs in a fragment of Hesiod. It is identical to Greek homeros "hostage," also "blind" (connecting notion is "going with a companion").
homer (n.) Look up homer at Dictionary.com
short for home run, from 1884. As a verb, from 1946. Related: Homered; homering.
Homeric (adj.) Look up Homeric at Dictionary.com
1771, from Homer + -ic. Homerical is from 1670s. Compare Latin Homericus, Greek Homerikos.
homeroom (n.) Look up homeroom at Dictionary.com
in the U.S. schools sense, 1915, from home (n.) + room (n.).
homeschool (v.) Look up homeschool at Dictionary.com
by 1989 (implied in homeschooling), from home (n.) + school (v.). Related: Homeschooled.
homesick (adj.) Look up homesick at Dictionary.com
1798, back-formation from homesickness.
homesickness (n.) Look up homesickness at Dictionary.com
1756, translating German heimweh, from Heim "home" + Weh "woe, pain;" the compound is from Swiss dialect, expressing the longing for the mountains. The word was introduced to other European languages 17c. by Swiss mercenaries. Also see nostalgia.
homespun (adj.) Look up homespun at Dictionary.com
1580s, "spun at home," from home (n.) + spun. Figurative sense of "plain, homely" is from c. 1600. As a noun, from c. 1600.
homestead (n.) Look up homestead at Dictionary.com
Old English hamstede "home, town, village," from home (n.) + stead (q.v.). In U.S. usage, "a lot of land adequate for the maintenance of a family" (1690s), defined by the Homestead Act of 1862 as 160 acres. Hence, the verb, first recorded 1872. Homesteader also is from 1872.
hometown (n.) Look up hometown at Dictionary.com
1879, from home (n.) + town.
homeward (adv.) Look up homeward at Dictionary.com
mid-13c., homward, from Old English ham weard; see home (n.) + -ward. Also Homewards, with adverbial genitive -s (Old English hamweardes).