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dertrum

[ dur-truhm ]

noun

Ornithology.
plural dertra
  1. the extremity of the maxilla of a bird's bill, especially when hooked or differentiated from the rest of the bill, as in pigeons and plovers.
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Word History and Origins

Origin of dertrum1

1885–90; < New Latin < Greek éٰDz membrane, derivative of é𾱲 to skin; compare é derma 1

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derryderv

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