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1. (n.) miosis
excessive constriction of the pupil of the eye.
Etymology: (1810–20; var. of myosis < Gk mý(ein) to shut (the eyes) + -osis)
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| Definition of 'miosis' |
Princeton's WordNet |
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1. (noun) meiosis, miosis, reduction division
(genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)
2. (noun) light reflex, pupillary reflex, miosis, myosis
reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
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| Definition of 'miosis' |
U.S. National Library of Medicine |
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1. miosis
Pupillary constriction. This may result from congenital absence of the dilatator pupillary muscle, defective sympathetic innervation, or irritation of the CONJUNCTIVA or CORNEA.
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Definitions of miosis 
