"cat-lover," 1931, with -phile "one that loves" + Greek ailouros "cat" (probably only "wildcat," as "domestic cats were not found in the Greek world" [Beekes]), which is of unknown origin. Usually explained as a compound of aiolos "quick-moving" + oura "tail," hence "with moving tail," which is plausible despite some phonetic difficulties, according to Beekes, who also notes "the word may well have been adapted by folk etymology ...." An earlier attempt at an English word for "cat-lover" was philofelist (1843).

 "enthusiast for or collector of gramophone recordings," 1940, from disc in the musical recording sense + -phile "one that loves or is attracted to." The earlier word was gramophile.

scientific name of the fruit fly, 1829, the genus name, from Modern Latin (Fallén, 1823), from Greek drosos "dew" (which Beekes says is "probably of Pre-Greek origin") + philos "loving" (see -phile).