nounWord forms: plural ˈthecae (ˈθisi
; t hēˈsē)
1. Botany a spore case, sac, or capsule
2. Zoology and Anatomy any sheath or sac enclosing an organ or a whole organism, as the covering of an insect pupa
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.