spina

[spahy-nuh]
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noun, plural spi·nae [spahy-nee] /ˈspaɪ ni/. Anatomy, Zoology.

a spine or spinelike projection.

Origin of spina

1350–1400; Middle English < Latin spīna thorn, backbone; see spine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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spina in Medicine

spina

[spīnə]

n. pl. spi•nae (-nē)

A spine-shaped or sharp thornlike anatomical process.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.