WordReference Random House Unabridged Dictionary of American English © 2025
per•i•go•ni•um
(per′i gō′nē əm),USA pronunciation n., pl. -ni•a (-nē ə).USA pronunciation [Bot.]
per′i•go′ni•al, per′i•go′nal, adj.
- Botanythe envelope of modified leaves surrounding the antheridia in mosses.
- Neo-Latin; see peri-, -gonium
- 1810–20