Umbo

Look up umbo in Wiktionary, the free dictionary.

Umbo may refer to:

• Umbo of tympanic membrane – The central, most inverted portion of the ear drum
• A shield boss
• umbo (mycology), at the top of some mushrooms
• Umbo (bivalve) is the (often somewhat protruding) part of a Bivalve shell which was formed when the animal was a juvenile
• The first year's growth of a seed scale on a pine cone, showing up as a protuberance at the end of the two-year-old scale
• The tiny depression in the very center of the foveola, and corresponds to the foveal reflex.
• Otto Umbehr, German photographer