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Noun
meiosis
miosis
reduction division
Definition: (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)
light reflex
pupillary reflex
miosis
myosis
Definition: reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
Definition: Contraction of the pupil of the eye.