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The Collaborative International Dictionary
Tectrices

Tectrices \Tec"tri*ces\, n. pl. [NL., fr. L. tegere, tectum, to cover.] (Zo["o]l.) The wing coverts of a bird. See Covert, and Illust. of Bird.

Wiktionary
tectrices

n. (plural of tectrix English)

WordNet
tectrices

See tectrix