• Webster's Revised Unabridged Dictionary
    • n Urostyle (Anat) A styliform process forming the posterior extremity of the vertebral column in some fishes and amphibians.
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Century Dictionary and Cyclopedia
    • n urostyle A prolongation backward of the spinal column, especially of the last vertebra, in certain fishes and amphibians: in some Amphibia forming the greater part of the so-called sacrum, or a long bone in the axis of the spinal column behind the sacrum proper, and approximately coextensive with the length of the ilia.
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Chambers's Twentieth Century Dictionary
    • n Urostyle ū′rō-stīl a prolongation backward of the last vertebra
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Webster's Revised Unabridged Dictionary
2d uro-, + Gr. a pillar
Chambers's Twentieth Century Dictionary
Gr. oura, tail, stylos, column.


In literature:

Posteriorly the vertebral column terminates in the urostyle, a calcified unsegmented rod.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells
Caudal vertebrae fused into a urostyle or coccyx.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 4" by Various
How are the urostyle and the pelvis connected, if at all?
"A Guide for the Study of Animals" by Worrallo Whitney