| 单词 | dertrum |
| 释义 | dertrum /derr"treuhm/, n. , pl. dertra /-treuh/. Ornith. 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. [1885-90; < NL < Gk dértron membrane, deriv. of dérein to skin; cf. dérma DERMA1] |
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