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hygienic

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(hī″jē-en′ik) 1. Pert. to health or hygiene. 2. In a healthy condition.

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hygienist

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(hī-jēn′ĭst) A specialist in hygiene.

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dental h. A licensed primary oral health care professional. The dental hygienist provides dental services that include education, prevention, and therapeutic services. The most common services provided are patient education, oral prophylaxis, dental radiographs, and fluoride applications. The practice of dental hygiene is regulated by laws called dental practice acts, which vary with each licensing jurisdiction.

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industrial h. A scientist or engineer engaged in the study, control, and prevention of health risks in the workplace.

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hygro-, hygr-

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[Gr. hygros, wet, moist] Prefixes meaning moist or wet.

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hygroma

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(hī-grō′mă, hī-grō′măt-ă) pl.

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hygromata

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[hygro- + -oma] A sac or bursa containing fluid.

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cystic h. A rapidly growing hygroma of lymphatic origin. It is usually located in the neck but may be in the thorax.

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hygrometer

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(hī-grŏm′ ĕ-tĕr) [″ + metron, measure] An instrument for measuring the amount of moisture in the air.

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hygroscopic

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(hī-grō-skŏp′ĭk) [″ + skopein, to examine] 1. Pert. to hygroscopy. 2. Absorbing moisture readily. SYN: bibulous; hydrophilous.

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hymen

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(hī′mĕn) [Gr.] A fold of mucous membrane that partially covers the entrance to the vagina. Contrary to folklore, the presence or absence (or rupture) of the hymen cannot be used to prove or disprove virginity or history of sexual intercourse. Pregnancy has been known to occur even when the hymen is intact. hymenal (-ăl), adj.

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annular h. A hymen with a ring-shaped opening in the center.

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h. biforis A vaginal membrane with two openings separated by a thick septum; the structure partially covers the os.

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cribriform h. A hymen with many small perforations. SYN: fenestrated h.

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h. denticulatus A hymen with an opening with serrated edges.

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fenestrated h. Cribriform h.

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imperforate h. A hymen without an opening. Menstruation occurs, but the blood cannot escape from the vagina because of the obstruction of the hymen. The treatment is surgical incision of the hymen. SYN: unruptured h.

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lunar h. A hymen shaped like a crescent moon.

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ruptured h. A hymen that has been torn by coitus, injury, or surgery.

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septate h. A hymen in which the opening is separated by a thin septum.

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unruptured h. Imperforate h.

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Hymenolepis

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(hī″mĕ-nol′ĕ-pĭs) [hymen + Gr. lepis, scale] A genus of tapeworm parasitic in birds and mammals.

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