hypoptilum

名词 n.
中文释义

英文释义

名词 n.
  1. An aftershaft. rare
    — This secondary feather is known as the aftershaft or hypoptilum, and its presence or absence constitutes the most important structural difference in the feathers of existing birds.

词形变化

hypoptila plural

词源

From New Latin hypoptilum, from hypo- + Ancient Greek πτίλον (ptílon, “soft feathers, down”).
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