— aphidian /euh fid"ee euhn/ , adj. , n. — aphidious , adj.
/ay"fid, af"id/ , n.
any of numerous tiny soft-bodied insects of the family Aphididae of worldwide distribution, that suck the sap from the stems and leaves of various plants, some developing wings when overcrowding occurs: an important pest of many fruit trees and vegetable crops. Also called plant louse .
[ 1880-85; back formation from APHIDES, pl. of APHIS ]