costal

[kos-tl, kaws-tl]
adjective
1.
Anatomy. pertaining to the ribs or the upper sides of the body: costal nerves.
2.
Botany, Zoology. pertaining to, involving, or situated near a costa.

Origin:
1625–35; < Medieval Latin costālis of the ribs, equivalent to Latin cost(a) rib, side + -ālis -al1

costally, adverb
postcostal, adjective
precostal, adjective
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World English Dictionary
costa (ˈkɒstə)
 
n , pl -tae
1.  the technical name for rib
2.  a riblike part, such as the midrib of a plant leaf
 
[C19: from Latin: rib, side, wall]
 
'costal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

costal
"pertaining to the ribs," 1630s, from Fr. costal, from Mod.L. costalis, from costa "a rib."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Articular cartilage, costal cartilage, and temporary cartilage are all of the hyaline variety.
Between it and the inferior border is a groove, the costal groove, for the intercostal vessels and nerve.
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