pygostyle

pygostyle

[pahy-guh-stahyl]
noun Ornithology.
the bone at the posterior end of the spinal column in birds, formed by the fusion of several caudal vertebrae.

Origin:
1870–75; < Greek pȳgo- (combining form representing pȳgḗ rump) + stŷlos pillar

pygostyled, adjective
pygostylous, adjective
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