- 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)
--1 is a kind of cell division, cellular division
--1 has parts:
--1 has particulars: nondisjunctionanaphase; cytokinesis; karyokinesis; metaphase; prophase; segregation; telophase - 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
--2 is a kind of reflex, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction