Definition of Miosis

1. 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).

Exact synonyms: Meiosis, Reduction Division
Category relationships: Genetic Science, Genetics
Terms within: Anaphase, Cytokinesis, Karyokinesis, Metaphase, Prophase, Segregation, Telophase
Generic synonyms: Cell Division, Cellular Division
Specialized synonyms: Nondisjunction
Derivative terms: Meiotic

2. 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.

Definition of Miosis

1. Noun. Contraction of the pupil of the eye. ¹

¹ Source: wiktionary.com

Definition of Miosis

1. excessive contraction of the pupil of the eye [n -OSES]

Medical Definition of Miosis

1. Contraction of the pupils. (12 Jan 1998)

Miosis Pictures

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Lexicographical Neighbors of Miosis

miocamycin
miocene
miodidymus
miofloral
miogeoclinal
miogeocline
miogeoclines
miohippus
miolecithal
miombo
miombos
mionectic
miopragia
miopus
mioses
miosis (current term)
miosphygmia
miostagmin reaction
miotic
miotics
mipmap
mipmapped
mipmapping
mipmaps
mipomersen
miquelet
miquelets
mir
mira
mirabelle

Literary usage of Miosis

Below you will find example usage of this term as found in modern and/or classical literature:

1. Text-book of Ophthalmology by Ernst Fuchs (1911)
"The greatest degree of spastic miosis is produced by the alkaloids which ... Paralytic miosis is one of the most important symptoms of paralysis of the ..."

2. The Eye and Nervous System: Their Diagnostic Relations by William Campbell Posey, William Gibson Spiller (1906)
"In cases of miosis with loss of sensory reflex, mydriatics effect ... Abnormal miosis with retention of light and convergence reflex ma} occur from abnormal ..."

3. A Manual of Pharmacology and Its Applications to Therapeutics and Toxicology by Torald Hermann Sollmann (1922)
"They consist in dyspnea; tremors and convulsions; miosis; debility and paralysis of certain muscle groups, especially the neck; abolition of certain ..."

4. Diseases of the eye by George Edmund De Schweinitz (1916)
"If the miosis is of cerebral origin, it indicates an early irritative ... Systematic writers have divided contraction of the pupil into irritation miosis, ..."

5. A Handbook of the diseases of the eye and their treatment by Henry Rosborough Swanzy (1897)
"Either cause alone would produce a medium miosis ; a combination of the two ... Irritation miosis, according to Leeser,.is not usually increased by the ..."

6. Review of the Department of Defense Research Program on Low-Level Exposures by Best, Committee on Toxicology, NetLibrary, Inc, National Research Council, National Academy of Sciences (2005)
"Although miosis typically has been considered the critical effect and most frequently ... (2003) found that mastication consistently preceded miosis and ..."

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