from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy The collective name for the muscles used to control the flow of
urinefrom the urinary bladder. These muscles surround the urethra, so that when they contract, the urethra is closed.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a striated sphincter muscle that constricts the urethra
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