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)]


 mioses
      See miosis