calamus scriptorius

[ kălə-məs skrĭp-tôrē-əs ]

n.

The inferior reedlike part of the rhomboid fossa of the fourth ventricle of the brain.Arantius' ventricle
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.