Skip to Content
Medical Term:


Pronunciation: tri-kop'ter-a


An order of insects in which the aquatic larvae (caddis flies) construct a protective case (caddis) of bits of submerged material in a highly specific form; commonly found attached under stones in freshwater streams. The adult caddis flies, having hairy wings, shed their hairs and epithelia, causing hay fever–like (allergic) symptoms in sensitive people.

[tricho- + G. pteron, wing]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.