apterium

English

Etymology

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

Pronunciation

• Rhymes: -ɪəɹiəm

Noun

apterium (plural apteria)

1. (ornithology) An area of bare (featherless) skin on a bird.
   • 1918, American Ornithologists' Union, The Auk‎^[1]:

     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.

Antonyms

• pteryla

Translations

an area of featherless skin

• Portuguese: aptéria f