DICT.TW Dictionary Taiwan
miosis
n 1: (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)
[syn: meiosis, reduction division]
2: reflex contraction of the sphincter muscle of the iris in
response to a bright light (or certain drugs) causing the
pupil to become smaller [syn: light reflex, pupillary
reflex, myosis]
[also: mioses (pl)]