trachelobregmatic diameter

[ trăk′ə-lō-brĕg-mătĭk ]

n.

The diameter of the fetal head from the middle of the anterior fontanelle to the neck.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.