WordReference Random House Unabridged Dictionary of American English © 2025
py•gid•i•um
(pī jid′ē əm),USA pronunciation n., pl. -gid•i•a (-jid′ē ə).USA pronunciation [Zool.]
py•gid′i•al, adj.
- Zoologyany of various structures or regions at the caudal end of the body in certain invertebrates.
- Greek pȳg(é̄) rump + -idion diminutive suffix
- Neo-Latin
- 1840–50