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ALL meanings of apterium

ap·te·ri·um
A a
  • noun apterium a bare patch on the skin of a bird between the feathered pterylae 3
  • noun apterium a bare area of skin between feather tracts on the body of a bird 3
  • noun plural apterium one of the featherless portions of the skin of a bird. 1
  • noun apterium (ornithology) An area of bare (featherless) skin on a bird. 0
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