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[ok-si-toh-suh n] /ˌɒk sɪˈtoʊ sən/

Biochemistry. a polypeptide hormone, produced by the posterior lobe of the pituitary gland, that stimulates contraction of the smooth muscle of the uterus.
Pharmacology. a commercial form of this substance, obtained from beef and hog pituitary glands or especially by synthesis, and used chiefly in obstetrics to induce labor and to control postnatal hemorrhage.
a polypeptide hormone, secreted by the pituitary gland, that stimulates contractions of the uterus or oviduct and ejection of milk in mammals; alphahypophame: used therapeutically for aiding childbirth. Formula: C43H68N12O12S2 Compare vasopressin

oxytocin ox·y·to·cin (ŏk’sĭ-tō’sĭn)
A short polypeptide hormone that is released from the posterior lobe of the pituitary gland and stimulates the contraction of smooth muscle of the uterus during labor and facilitates release of milk from the breast during nursing.
A polypeptide hormone secreted by the posterior portion of the pituitary gland. Oxytocin stimulates the contraction of smooth muscle of the uterus during childbirth and facilitates ejection of milk from the mammary glands.


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  • Oxyuriasis

    [ok-see-yoo-rahy-uh-sis] /ˌɒk si yʊˈraɪ ə sɪs/ noun, Pathology. 1. human infection with pinworms. oxyuriasis ox·y·u·ri·a·sis (ŏk’sē-yu-rī’ə-sĭs) n. Infestation with parasitic nematodes of the family Oxyuridae.

  • Oxyuricide

    oxyuricide ox·y·u·ri·cide (ŏk’sĭ-yur’ĭ-sīd’) n. An agent that destroys pinworms.

  • Oxyuridae

    Oxyuridae Ox·y·u·ri·dae (ŏk’sĭ-yur’ĭ-dē) n. A family of parasitic nematodes found in the large intestine of vertebrates and in the intestine of invertebrates.

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