MIOSIS (mioses)

Pronunciation (US):

(GB):

Irregular inflected form: mioses   

 Dictionary entry overview: What does miosis mean? 

• MIOSIS (noun)
  The noun MIOSIS has 2 senses:

1. (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)

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

  Familiarity information: MIOSIS used as a noun is rare.

 Dictionary entry details 

• MIOSIS (noun)

Sense 1

Meaning:

(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)

Classified under:

Nouns denoting natural processes

Synonyms:

meiosis; miosis; reduction division

Hypernyms ("miosis" is a kind of...):

cell division; cellular division (the process in reproduction and growth by which a cell divides to form daughter cells)

Meronyms (parts of "miosis"):

anaphase (the stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle)

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)

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)

Domain category:

genetic science; genetics (the branch of biology that studies heredity and variation in organisms)

Hyponyms (each of the following is a kind of "miosis"):

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)

Sense 2

Meaning:

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

Classified under:

Nouns denoting acts or actions

Synonyms:

light reflex; miosis; myosis; pupillary reflex

Hypernyms ("miosis" is a kind of...):

inborn reflex; innate reflex; instinctive reflex; physiological reaction; reflex; reflex action; reflex response; unconditioned reflex (an automatic instinctive unlearned reaction to a stimulus)

Derivation:

miotic (of or relating to or causing constriction of the pupil of the eye)

 Context examples 

Administered in the eye, dapiprazole hydrochloride produces miosis.

(Dapiprazole Hydrochloride, NCI Thesaurus)

Levorphanol tartrate mimics the actions of endogenous peptides at CNS opioid receptors, thereby producing the characteristic morphine-like effects on the mu-opioid receptor, including analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia and physical dependence.

(Levorphanol Tartrate, NCI Thesaurus)

This agent binds to opioid mu receptors, thereby producing analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia, and physical dependence.

(Levorphanol, NCI Thesaurus)

Alphaprodine mimics the actions of endogenous neuropeptides by binding to opioid receptors, thereby producing characteristic morphine-like effects via the mu-opioid receptor, including analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia, and physical dependence.

(Alphaprodine Hydrochloride, NCI Thesaurus)

By binding to the mu-opioid receptors, oxycodone terephthalate also causes euphoria, anxiolysis, miosis, sedation, physical dependence, constipation, respiratory depression as well as a depressive effect on the cough center in the medulla.

(Oxycodone Terephthalate, NCI Thesaurus)

This leads to an inhibition of the typical actions of opioid analgesics, including analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia, and physical dependence.

(Naltrexone, NCI Thesaurus)

Levomethadyl acetate hydrochloride mimics the actions of endogenous peptides at CNS opioid receptors, including analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia and physical dependence.

(Levomethadyl Acetate Hydrochloride, NCI Thesaurus)

This leads to analgesia, euphoria, respiratory depression, miosis, decreased gastrointestinal motility, cough suppression and physical dependence.

(Hydrocodone, NCI Thesaurus)

This drug is administered ocularly to induce miosis to reduce intraocular pressure in the treatment of glaucoma.

(Carbachol, NCI Thesaurus)

This causes contraction of the iris sphincter muscle (producing miosis) and the ciliary muscle (affecting the accommodation reflex).

(Demecarium, NCI Thesaurus)