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pygostyle

[pahy-guh-stahyl] /ˈpaɪ gəˌstaɪl/
noun, Ornithology
1.
the bone at the posterior end of the spinal column in birds, formed by the fusion of several caudal vertebrae.
Origin
1870-1875
1870-75; < Greek pȳgo- (combining form representing pȳgḗ rump) + stŷlos pillar
Related forms
pygostyled, adjective
pygostylous, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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