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单词 alula
释义

alula

/ˈaljʊlə /
noun (plural alulae /ˈaljʊliː/)
Technical term for bastard wing.Although the alula is absent, the third finger probably had the same function in controlling separation of the upper surface airflow....
  • Yearlings in the study were identified in the hand by the olivegreen (rather than blue) edges of their alulae and primary coverts.
  • It has pure white body feathers except for the black alulae, primary techrices and primary remiges.

Origin

Late 18th century: modern Latin, literally 'small wing', diminutive of ala.

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更新时间:2024/11/12 8:09:42