HyperDic: involuntary_muscle

English > 1 sense of the expression *involuntary muscle*:
NOUN	body	involuntary muscle, smooth muscle	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)

English > *involuntary muscle*: 1 sense > noun 1, body
Meaning	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).
Synonym	smooth muscle
Narrower	musculus sphincter ani internus	An internal ring of smooth muscle formed by circular fibers of the rectum
Narrower	myometrium	The smooth muscle forming the wall of the uterus
Broader	muscle, musculus	One of the contractile organs of the body
Spanish	músculo involuntario