tertial

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English[edit]

Etymology[edit]

From Latin tertius (third); the tertial feathers are the third row of feathers.

Pronunciation[edit]

Noun[edit]

tertial (plural tertials)

  1. (ornithology) Any flight feather attached to the humerus (upper arm) of a bird.
    • 1923, Arthur Cleveland Bent, Life Histories of North American Birds: Wild Fowl, page 76:
      He continues — "There was the same rear up, with the head bent down, followed by an upjerk of the hind parts; the long sickle-shaped tertials, so noticeable in this species, seemed little if at all expanded, []

Related terms[edit]