springtail 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.
any of an order (Collembola) of small, primitive, wingless insects, able to leap great distances by the sudden release of a forklike, abdominal appendage
springtail definition by American Heritage Dictionary
Any of various small wingless insects of the order Collembola, having abdominal appendages that act as springs to catapult them through the air. Also called collembolan.