- one of the tail feathers of a bird controlling direction during flight.
Origin of rectrix
1605–15; < Latin rēctrīx, feminine of rēctor rector
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rectrix
The outermost rectrix of No. 31633 is wholly white; the second rectrix is nearly as white.Birds from Coahuila, Mexico
Emil K. Urban
Rectrix, rek′triks, n. one of the long tail-feathers of a bird, so called because used in steering the bird in its flight:—pl.
- any of the large stiff feathers of a bird's tail, used in controlling the direction of flight
C17: from Late Latin, feminine of rector governor, rector