| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024hy•dro•the•ca (hī′drə thē′kə),USA pronunciation n., pl. -cae (-kē).USA pronunciation [Zool.]- Zoologythe part of the perisarc covering a hydranth.
- Neo-Latin; see hydro-1, theca
- 1870–75
hy′dro•the′cal, adj. |