| Word | Definitions | Synonyms |
|---|---|---|
| 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 | Synonyms: light reflex, myosis, pupillary reflex |
| (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) | Synonyms: meiosis, reduction division |