noun, plural rec·tri·ces [rek-trahy-seez, rek-truh-seez] /rɛkˈtraɪ siz, ˈrɛk trəˌsiz/. Ornithology.
Origin of rectrix
Related formsrec·tri·cial [rek-trish-uh l] /rɛkˈtrɪʃ əl/, adjective
Examples from the Web for rectrices
Quill feathers of the wing (remiges) and tail (rectrices); the former are attached to the hand and forearm.The New Gresham Encyclopedia|Various
Slightly elevated remiges and rectrices, still in the sheath, were visible on the ninth day.The Postnatal Development of Two Broods of Great Horned Owls|Donald F. Hoffmeister
Nasal depression more than half as long as maxilla; rectrices twelve.British Birds in their Haunts|Rev. C. A. Johns
The last six or seven caudal vertebrae coalesce into the pygostyle, an upright blade which carries the rectrices.
Rectrices beneath yellowish grey, darker toward the tips of the longer feathers.Extinct Birds|Walter Rothschild