| actomyosin | (noun) a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions | - |
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| adenomyosarcoma | (noun) malignant renal tumor of young children characterized by hypertension and blood in the urine and the presence of a palpable mass | Synonyms: embryoma of the kidney, nephroblastoma, Wilms' tumor, Wilms tumour |
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| adenomyosis | (noun) the presence of endometrium elsewhere than in the lining of the uterus; causes premenstrual pain and dysmenorrhea | Synonyms: endometriosis |
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| dermatomyositis | (noun) myositis characterized by weakness of limb and neck muscles and much muscle pain and swelling accompanied by skin rash affecting cheeks and eyelids and neck and chest and limbs; progression and severity vary among individuals | - |
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| fibromyositis | (noun) local inflammation of muscle and connective tissue | - |
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| leiomyosarcoma | (noun) sarcoma of smooth muscle; occurs most often digestive tract or uterus or bladder or prostate | - |
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| myosarcoma | (noun) sarcoma of muscle tissue | - |
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| myosin | (noun) the commonest protein in muscle; a globulin that combines with actin to form actomyosin | - |
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| myosis | (noun) reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller | Synonyms: light reflex, miosis, pupillary reflex |
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| (noun) an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest) | Synonyms: Bornholm disease, diaphragmatic pleurisy, epidemic myalgia, epidemic pleurodynia |
| myositis | (noun) inflammation of muscle tissue | - |
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| polymyositis | (noun) myositis characterized by weakness of limb and neck muscles and much muscle pain and swelling; progression and severity vary among individuals | - |
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| rhabdomyosarcoma | (noun) a highly malignant neoplasm derived from striated muscle | Synonyms: rhabdosarcoma |
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