mi·o·sis also my·o·sis (m -  s s)n. pl. mi·o·ses also my·o·ses (-s  z) Constriction of the pupil of the eye, resulting from a normal response to an increase in light or caused by certain drugs or pathological conditions. [Greek m  ein, to close the eyes + -osis.] |
miosis, myosis [maɪˈəʊsɪs]
n pl -ses [-siːz]
1. (Medicine / Pathology) excessive contraction of the pupil of the eye, as in response to drugs
2. (Life Sciences & Allied Applications / Biology) a variant spelling of meiosis [1]
[from Greek muein to shut the eyes + -osis]
miotic , myotic [maɪˈɒtɪk] adj & n
miosis, myosis
abnormal constriction of the pupil of the eye, caused by drugs or illness. Cf. mydriasis. — miotic, myotic, adj.
See also: Eyes
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  miosis - (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)genetic science, genetics - the branch of biology that studies heredity and variation in organisms anaphase - the stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle cell division, cellular division - the process in reproduction and growth by which a cell divides to form daughter cells cytokinesis - organic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cells karyokinesis - organic process consisting of the division of the nucleus of a cell during mitosis or meiosis metaphase - the second stage of meiosis nondisjunction - meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells prophase - the first stage of meiosis segregation - (genetics) the separation of paired alleles during meiosis so that members of each pair of alleles appear in different gametes telophase - the final stage of meiosis when the chromosomes move toward opposite ends of the nuclear spindle |
| 2. |  miosis - reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smallerinborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex - an automatic instinctive unlearned reaction to a stimulus |
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