apterium
Definitions
An area of bare (featherless) skin on a bird.
Equivalents
Portuguêsaptéria
Examples
“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.”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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