- the bone at the posterior end of the spinal column in birds, formed by the fusion of several caudal vertebrae.
Origin of pygostyle
1870–75; < Greek pȳgo- (combining form representing pȳgḗ rump) + stŷlos pillar
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pygostyle
In the Ratitae and Tinamidae a pygostyle is rarely or imperfectly developed.
The origin of pars caudifemoralis in three legs is directly from the anteroventral surface of the pygostyle.Variation in the Muscles and Nerves of the Leg in
E. Bruce Holmes
Rump′-post, the share bone or pygostyle of a bird; Rump′-steak, steak cut from the thigh near the rump.
In proportionate size (see Table 7), the pygostyle of Bombycilla is the smallest in the family.Phylogeny of the Waxwings and Allied Birds
M. Dale Arvey
The posterior caudal vertebrae are ankylosed forming a pygostyle.