(historical) The boss of a shield, at or near the middle and usually projecting, sometimes in a sharp spike. / (anatomy) An inward projection of the tympanic membrane of the ear.

plural of umbo

plural of umbo

Pertaining to an umbo.

plural of umbo

(mycology, of a mushroom etc) Having an umbo

(mycology) Having a broad and non-pointy umbo.

Synonym of umbo

(mineralogy) An amorphous mineral containing hydrogen, oxygen, silicon, sodium, strontium, and thorium.

Relating to the umbo.