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See more synonyms for pygostyle on Thesaurus.com
noun Ornithology.
  1. the bone at the posterior end of the spinal column in birds, formed by the fusion of several caudal vertebrae.
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Origin of pygostyle

1870–75; < Greek pȳgo- (combining form representing pȳgḗ rump) + stŷlos pillar
Related formspy·go·styled, adjectivepy·go·sty·lous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pygostyle

Historical Examples

  • In the Ratitae and Tinamidae a pygostyle is rarely or imperfectly developed.

    The Vertebrate Skeleton

    Sidney H. Reynolds

  • The origin of pars caudifemoralis in three legs is directly from the anteroventral surface of the pygostyle.

  • 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.

  • The posterior caudal vertebrae are ankylosed forming a pygostyle.

    The Vertebrate Skeleton

    Sidney H. Reynolds