looker (n.) Look up looker at Dictionary.com
Old English locere "one engaged in looking," agent noun from look (v.). Meaning "one who watches over" is from c. 1300. Sense of "one who has a certain appearance" is late 15c.; slang meaning "attractive woman" attested from 1893 (good-looker is attested from 1866, both of women and horses). Looker-on "observer, spectator" is by 1590s; looker-in (1927) was an early word for "television viewer." In Middle English a lokere-oute was "one who divines by looking at entrails."