Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
noun pl. whiteflies
any of a family (Aleyrodidae) of tiny homopteran insects having scalelike larvae and winged adults covered with a white, powdery wax
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Any of various small whitish homopterous insects of the family Aleyrodidae, having long wings and a white waxy body, often injurious to plants.