fabella

[ fə-bĕlə ]

n. pl. fa•bel•lae (-bĕlē)

A small sesamoid bone in the tendon of the lateral head of the gastrocnemius muscle.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.