umbo

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|historical}} The [[boss]] of a [[shield]], at or near the middle and usually [[project]]ing, sometimes in a sharp [[spike]].
2. {{lb|en|biology}} A [[boss]], or [[round]]ed [[elevation]], or a corresponding [[depression]], in a [[palate]], [[disk]], or [[membrane]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.