Source : Webster's Revised Unabridged Dictionary (1913)

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}.

Source : WordNet®

tectrices
     See {tectrix}