n. Biology, pl., -tae (-tē).
A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
[Latin.]
costal cos'tal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
