Umbo
/ˈʌm.bəʊ/ noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 The boss of a shield, at or near the middle and usually projecting, sometimes in a sharp spike. historical
"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."
- 2 a slight rounded elevation where the malleus attaches to the eardrum wordnet
- 3 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.
- 4 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.
- 5 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.
Synonyms
All synonymsExample
More examples"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."
Etymology
Borrowed from Latin umbō (“a shield boss”). Doublet of umbone.