[ey-fis, af-is]

noun, plural a·phi·des [ey-fi-deez, af-i-] /ˈeɪ fɪˌdiz, ˈæf ɪ-/.

an aphid, especially of the genus Aphis.

Origin of aphis

1765–75; < New Latin, first recorded in a Gk lexicon of 1523 as áphis, with the Latin gloss cimex bedbug; perhaps originally a misreading of Greek kóris bug


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noun plural aphides (ˈeɪfɪˌdiːz)

any of various aphids constituting the genus Aphis, such as the blackfly
any other aphid

Word Origin for aphis

C18: from New Latin (coined by Linnaeus for obscure reasons)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012