umbo
/ˈʌmboʊ/
noun
- A rounded, raised boss or knob at the center of a shield.
- The museum displayed a bronze umbo from an ancient Greek shield.
- The Viking shield had an iron umbo that protected the warrior's hand.
- He polished the umbo until it gleamed like a mirror.
- The beak or pointed tip of a bivalve mollusk shell, near the hinge.
- The clam's umbo showed growth rings like a tree trunk.
- The fossil had a well-preserved umbo with fine ridges.
- She identified the species by the shape of its umbo.
- A central, raised part of any structure; a boss or protuberance.
- The cathedral's dome had an ornate umbo at its peak.
- Geologists studied the umbo of the volcanic mound.
- The fungus had a dark umbo in the center of its cap.
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