Umbo definition

ŭmbō
The boss or knob at the center of a shield.
noun
2
0
The boss, or knob, at the center of a shield.
noun
1
0
(mycology) A bump or protrusion on the top of the cap.
noun
1
0
(biology) A knoblike protuberance arising from a surface, as the prominence near the hinge of a bivalve shell or the raised area in the center of the cap of a mushroom.
noun
0
0
(anatomy) A small projection at the center of the outer surface of the eardrum.
noun
0
0
Advertisement
Something resembling this.
  • The elevation beside the hinge on each half of a bivalve shell.
  • The prominence on the eardrum at the point of attachment of the malleus.
noun
0
0
A small anatomical projection on a surface, such as that on the inner surface of the eardrum at the end of the manubrium of the malleus, corresponding to the most elevated point of the eardrum.
noun
0
0
(biology) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvæ of echinoderms or in the tympanic membrane of the ear.
noun
0
0
(zoology) One of the lateral prominence just above the hinge of a bivalve shell.
noun
0
0
(historical) The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.
noun
0
0
Advertisement

Other Word Forms

Noun

Singular:
umbo
Plural:
umboes, umbones, umbos

Origin of umbo

  • Latin umbō umbōn- nobh- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Borrowed from Latin umbo

    From Wiktionary