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dertrum

 - 1 dictionary result

der⋅trum

  [dur-truhm]
Use dertrum in a Sentence
–noun, plural -tra  [-truh] . Ornithology.
the extremity of the maxilla of a bird's bill, esp. when hooked or differentiated from the rest of the bill, as in pigeons and plovers.
Origin:
1885–90; < NL < Gk dértron membrane, deriv. of dérein to skin; cf. dérma derma 1
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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