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Miosis

//maɪˈoʊsɪs// noun

Definitions

Noun
  1. 1
    Contraction of the pupil of the eye. abbreviation, alt-of, contraction, countable, uncountable

    "Horner's syndrome consists of typically unilateral miosis and eyelid ptosis, and absent forehead sweating."

  2. 2
    Alternative spelling of meiosis. alt-of, alternative, countable, obsolete, uncountable

    "Though some condemn rhetoric as the mother of lies, speaking more than the truth in hyperboles, less in her miosis, otherwise in her metaphors, contrary in her ironies, yet is there excellent use of all these […]"

  3. 3
    reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller wordnet
  4. 4
    (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) wordnet

Etymology

Etymology 1

From Ancient Greek μύω (múō, “to close the eyes”) + -osis.

Etymology 2

From Ancient Greek μείωσις (meíōsis).

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