[ kos-tl, kaws-tl ]
/ ˈkɒs tl, ˈkɔs tl /


Anatomy. pertaining to the ribs or the upper sides of the body: costal nerves.
Botany, Zoology. pertaining to, involving, or situated near a costa.

Origin of costal

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

Related forms

cos·tal·ly, adverbpost·cos·tal, adjectivepre·cos·tal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for costal