umbo.
The boss of a shield, at or near the middle and usually projecting, sometimes in a sharp spike.
Meaning & usage
The boss of a shield, at or near the middle and usually projecting, sometimes in a sharp spike.
A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane. An inward projection of the tympanic membrane of the ear.
A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane. One of the lateral prominences just above the hinge of a bivalve shell.
A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane. A bump or protrusion on the cap of a mushroom or toadstool.
Where this word comes from
Borrowed from Latin umbō (“a shield boss”). Doublet of umbone.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.