sheep tick 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.
a wingless, flattened, leathery dipterous fly (Melophagus ovinus) that is an external parasite on sheep
sheep tick definition by American Heritage Dictionary
A wingless louselike fly (Melophagus ovinus) that is parasitic to sheep, causing skin irritations that result in loss of wool. Also called sheep ked.