Passavant's cushion

Pas·sa·vant's cushion

(păs′ə-vănts′)
n.
A prominence on the posterior wall of the nasal pharynx formed by contraction of the superior constrictor of the pharynx during swallowing.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.