n.
A yellow oily acid, C9H17NO5, belonging to and found widely in plant and animal tissues.
[From Greek pantothen, from all sides : panto-, all (from pās, pant-; see pan-) + -then, adv. suff..]
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.