apterium

名词 n.
中文释义

英文释义

名词 n.
  1. An area of bare (featherless) skin on a bird.
    — The two halves of the lower cervical tract are still separated by an apterium 4 mm. wide, as in the young bird, but contour feathers are now present on the chin and upper throat, so that they are united at their upper ends.

词形变化

apteria plural

词源

From a- + Ancient Greek πτερόν (pterón, “feather”) + -ium. Compare Ancient Greek ἄπτερος (ápteros, “featherless”).
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