rectrix

(redirected from rectricial)
Also found in: Dictionary, Encyclopedia.

rectrix

(rĕk′trĭks)
n. pl. rectrices (rĕk′trĭ-sēz′, rĕk-trī′sēz)
One of the stiff main feathers of a bird's tail, used to stabilize the bird while in flight and to control its direction.

rectrix

(pl. retrices) see FEATHER.
References in periodicals archive ?
Prior to Baumel's (1988) comprehensive treatise on the pigeon tail, the morphology and functional significance of the rectricial bulb were almost completely unknown.
Our data indicate that the lateralis caudae is neither capable of nor necessary for fanning, making the rectricial bulb fanning mechanism significantly more independent.
This rigidity, however, probably limited rectricial movement.
Third, motion of the caudal vertebrae was linked to rectricial movement.
A rudimentary abduction mechanism and limited rectricial mobility probably constrained the range of lift forces produced by the tail.
Finally, the mechanical linkage between vertebral and rectricial movement in Archaeopteryx probably hampered coordinated turning.