smooth_muscle
1. [ noun ] (anatomy,zoology) 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)
Synonyms: involuntary_muscle
Related terms: muscle myometrium musculus_sphincter_ani_internus
2. [ noun ] (anatomy,zoology) muscle tissue that does not appear striated under the microscope; has the form of thin layers or sheets
Related terms: muscle smooth_muscle_cell
Similar spelling:   smoothness