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We found 6 dictionaries with English definitions that include the word involuntary muscles:
Click on the first link on a line below to go directly to a page where "involuntary muscles" is defined.

General (3 matching dictionaries)

1. involuntary muscles: Merriam-Webster.com [home, info]
2. involuntary muscles: Vocabulary.com [home, info]
3. involuntary muscles: Wiktionary [home, info]

Computing (1 matching dictionary)

4. Involuntary muscles: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

5. involuntary muscles: online medical dictionary [home, info]
6. Involuntary muscles: Medical dictionary [home, info]

(Note: See involuntary_muscle for more definitions.)

Quick definitions from WordNet (involuntary muscle) ▸ 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) ▸ Also see involuntary_muscle ▸ Words similar to involuntary muscles ▸ Usage examples for involuntary muscles ▸ Words that often appear near involuntary muscles ▸ Rhymes of involuntary muscles ▸ Invented words related to involuntary muscles