tertial

[tur-shuh l]Ornithology
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adjective

pertaining to any of a set of flight feathers situated on the basal segment of a bird's wing.

noun

a tertial feather.

Origin of tertial

1830–40; < Latin terti(us) third + -al1
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British Dictionary definitions for tertial

tertial

adjective, noun

Word Origin for tertial

C19: from Latin tertius third, from ter thrice, from trēs three
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