apterium
/ap-teer-ee-uhm/US // æpˈtɪər i əm //
隐蔽性,隐蔽性极强,隐蔽性强,隐蔽性好
Definitions
n.名词 noun
- 1
plural ap·te·ri·a [ap-teer-ee-uh]. /æpˈtɪər i ə/. Ornithology.
- : one of the featherless portions of the skin of a bird.
Examples
But, the male loses most of the down feathers of the ventral apterium.
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