from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy Muscle that is not controlled by individual
volition; cardiac muscleand smooth muscle.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)
Sorry, no etymologies found.
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