English

Pronunciation
:Rhymes: Rhymes:English:-�mb��|-�mb��

Noun
umbo (plural umbones or umbos)

1. (Armor) The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.

#:Quotations
#:*1786: It is thirteen inches diameter, made of wood covered with leather, and an iron plate decorated with nails and mouldings; the boss or umbo projects four inches. — Francis Grose, A Treatise on Ancient Armour and Weapons, page xii.

1. 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.
2. zoology One of the lateral prominence just above the hinge of a bivalve shell.

Derived terms
umbonal
umbonic

See also
boss

Category:Armor

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• 2007-06-15 18:41 - AutoFormat - -(''Zoology'') +{{zoology}}

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