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(ŏk′tă-ploy″dē) The condition of having eight sets of chromosomes.


(ŏk″tă-vā′lĕnt) [L. octo, eight, + valeo, to have power] Having a valence of eight.


(ŏk″tĭ-grăv′ĭ-dă) [″ + gravida, pregnant] A woman who has been pregnant eight times.


(ŏk-tĭp′ă-ră) [″ + L. parere, to bring forth, to bear] A woman who has given birth to eight children.


(ok″tō-kril′ēn) An ultraviolet filtering chemical found in some topical sunscreens. It is an occasional cause of photoallergic contact dermatitis.


(ŏk″tō-jĕn-ĕr′ē-ĕ-) [L. octogenarius, containing eighty] A person who is 80 to 89 years old.


(ŏk′ū-lăr) [L. oculus, eye] 1. Concerning the eye or vision. 2. The eyepiece of a microscope.

ocular histoplasmosis syndrome

ABBR: OHS. A disease of the macula found in young and middle-aged adults from the Ohio and Mississippi river valleys, in which loss of vision occurs with central scotoma. It is also known as presumed ocular histoplasmosis syndrome (POHS), since the macular lesion is thought to be caused by Histoplasma capsulatum, a fungus that does not grow in cultures of pathological specimens from affected lesions.

ocular ischemic syndrome

A rare syndrome in which gradual or sudden loss of vision results from blockage of blood flow through the carotid arteries to the eyes. The disease is found most often in patients with other risk factors for cardiovascular disease, such as diabetes mellitus, hyperlipidemia, and hypertension. Ophthalmic examination may reveal neovascularization of the retina, retinal microinfarcts, or elevated intraocular pressures.


(ŏk′ū-lăr-ĭst) An allied health specialist who is prepared by training and experience to make and fit artificial eyes.

ocular masquerade syndrome

Presentation of a cancer of the eyelid as inflammation of the eyelid, conjunctiva, or tarsal glands, mimicking a benign condition.

ocular pursuit

The ability of the eyes to follow a moving object.


(ŏk′ū-lī) Pl. of oculus.

oculo-, ocul-

[L. oculus, eye] Prefixes meaning eye.


(ŏk″ū-lō-kū-tā′nē-ŭs) Concerning the eyes and the skin.

oculodermal melanocytosis

(ŏk″ū-lō-dĕr′măl mĕl″ă-nō-sī-tō′sĭs) SEE: Ota nevus.


(ŏk″ū-lō-fā′shē-ăl) Concerning the eyes and the face.


(ŏk″ū-lō-jī-rā′shŭn) [″ + Gr. gyros, circle] The circular motion of the eyeball around its antero-posterior axis. SEE: nystagmus.



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