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   Um·bo

   /ˈəmbō/

   

   noun

   • 1. the central boss of a shield. historical
   • 2. a rounded knob or protuberance.
   • ▪ the highest point of each valve of a bivalve shell.
   • ▪ a central swelling on the cap of a mushroom or toadstool.

   Word Origin early 18th century: from Latin, ‘shield boss’.

   Scrabble Points: 8

   • U

     1

   • M

     3

   • B

     3

   • O

     1

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