☆ the tiny, red larva of a family (Trombiculidae) of mites, whose bite causes severe itching
See chigger in American Heritage Dictionary 4
(chĭgˈər)
noun
Any of various small, six-legged larvae of mites of the family Trombiculidae, parasitic on insects, humans, and other vertebrates. The chigger's bite produces a wheal that is usually accompanied by severe itching. Also called chigoe, harvest bug, harvest mite, jigger2, red bug.