1. miosis

noun. (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).


  • cell division
  • nondisjunction
  • segregation
  • telophase
  • karyokinesis
  • meiosis
  • metaphase
  • cellular division
  • cytokinesis
  • prophase
  • anaphase

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2. miosis

noun. reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller.


  • reflex action
  • instinctive reflex
  • light reflex
  • unconditioned reflex
  • innate reflex
  • physiological reaction
  • reflex
  • myosis
  • reflex response
  • pupillary reflex


  • overstatement
  • voluntary

Example sentences of the word miosis

1. Noun, singular or mass
The process of pupil constriction is called miosis**.