the GNU version of the Collaborative International Dictionary of English
n. A little valve; a valvelet.
n. A small valvelike process.
The Century Dictionary and Cyclopedia
n. A little valve.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a small valve
Word Usage
"Oesophageal valve: a funnel-like folding of the oesophagus, extending into the chylific ventricle in some insects, and forming a valve that controls the entrance of food into that organ: = cardiac valvule."