whitefly definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. whiteflies
any of a family (Aleyrodidae) of tiny homopteran insects having scalelike larvae and winged adults covered with a white, powdery wax
whitefly definition by American Heritage Dictionary
Any of various small whitish homopterous insects of the family Aleyrodidae, having long wings and a white waxy body, often injurious to plants.