WordReference Random House Unabridged Dictionary of American English © 2026
um•bo•nate
(um′bə nit, -nāt′),USA pronunciation adj.
- having an umbo or projecting boss.
- shaped like an umbo;
having a rounded convex form:an umbonate fungus.
- Latin umbōn- (stem of umbō; see umbo) + -ate1
- 1820–30
'umbonate' also found in these entries (note: many are not synonyms or translations):