sternebra

[stûrnə-brə]
n. pl. ster•ne•brae (-brē)
  1. One of the four segments of the primordial sternum of the embryo, the fusion of which forms the body of the adult sternum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.