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Shield knob
Answer for the clue "Shield knob ", 4 letters:
umbo
Alternative clues for the word umbo
Word definitions for umbo in dictionaries
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
"boss of a shield," 1921, from Latin umbo "shield-boss, knob, projection."
Usage examples of umbo.
The edges were obtuse, the caps fleshy, then corky, smooth, the upper ends not regular, oblique in the form of an umbo or little knob, the pellicles or outside layers thin and easily separated.