Definitions for: Myosis

[n] reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
[n] an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest)

Webster (1913) Definition: My*o"sis, n. [NL., fr. Gr. ? to close the eyes or
lips.] (Med.)
Long-continued contraction of the pupil of the eye.

Synonyms: Bornholm disease, diaphragmatic pleurisy, epidemic myalgia, epidemic pleurodynia, light reflex, miosis, pupillary reflex

See Also: epidemic disease, inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, unconditioned reflex

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