| ophthalmoscopy | <procedure> Observation of the optic disc, retina and blood vessels. May be examined by direct or indirect ophthalmoscopy. In direct ophthalmoscopy the examiner uses an ophthalmoscope the size of a flashlight to shine a beam of light into your eye. In indirect ophthalmoscopy a head lamp device is used and a much brighter light. Visualisation of the retina is important in conditions such as glaucoma, diabetes, hypertension and conditions that cause increased intracranial pressure. (27 Sep 1997) |
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| ophthalmoscopy with reflected light | Examination of that part of the fundus adjacent to an area illuminated by a sharply focused light. (05 Mar 2000) |
| ophthalmotrope | A model of the two eyes, to each of which are attached weighted cords pulling in the direction of the six extrinsic eye muscles; used to demonstrate the action of the ocular muscles singly or in various combinations. Origin: ophthalmo-+ G. Tropos, a turning (05 Mar 2000) |
| ophthalmovascular | Relating to the blood vessels of the eye. (05 Mar 2000) |
| ophthalmy | Same as Ophthalmia. Source: Websters Dictionary (01 Mar 1998) |
| opianic | <chemistry> Of, pertaining to, or designating, an organic acid obtained by the oxidation of narcotine. Origin: From Opium. Source: Websters Dictionary (01 Mar 1998) |
| opianine | <chemistry> An alkaloid found in small quantity in opium. It is identical with narcotine. Source: Websters Dictionary (01 Mar 1998) |
| opianyl | <chemistry> Same as Meconin. Origin: Opianic + -yl. Source: Websters Dictionary (01 Mar 1998) |
| opiate | <pharmacology> A remedy containing or derived from opium, also any drug that induces sleep. Naturally occuring basic (alkaloid) molecules with a complex fused ring structure. Have high pharmacological activity. See: morphine. (18 Nov 1997) |
| opiate receptor | <pharmacology> Opiate-binding sites found throughout primary afferents and the neuraxis. (16 Dec 1997) |
| opiate receptors | Regions of the brain which have the capacity to bind morphine; some, along the aqueduct of Sylvius and in the centre median, are in areas related to pain, but others, as in the striatum, are not related. (05 Mar 2000) |
| opine | <molecular biology> Compound produced by plant cells containing T DNA: induce transfer genes on Ti plasmids. (18 Nov 1997) |
| opioid | Originally, a term denoting synthetic narcotics resembling opiates but increasingly used to refer to both opiates and synthetic narcotics. (05 Mar 2000) |
| opioid agonist | <pharmacology> Any morphine-like compound that produces bodily effects including pain relief, sedation, constipation and respiratory depression. (16 Dec 1997) |
| opioid antagonists | Agents such as naloxone and naltrexone which have high affinity for opiate receptors but do not activate these receptors. These drugs block the effects of exogenously administered opioids such as morphine, heroin, meperidine, and methadone, or of endogenously released endorphins and enkephalins. (05 Mar 2000) |
| operative |
being in force or having or exerting force; "operative regulations"; "the major tendencies operative in the American political system" of or relating to a surgical operation; "operative surgery" surgical: relating to or requiring or amenable to treatment by surgery especially as opposed to medicine; "a surgical appendix"; "a surgical procedure"; "operative dentistry" secret agent: a person secretly employed in espionage for a government effective; producing a desired effect; "the operative word" private detective: someone who can be employed as a detective to collect information running(a): (of e.g. a machine) performing or capable of performing; "in running (or working) order"; "a functional set of brakes"
출처: wordnet.princeton.edu/perl/webwn
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| optic chiasm |
optic chiasma: the crossing of the optic nerves from the two eyes at the base of the brain
출처: wordnet.princeton.edu/perl/webwn
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| optic cup |
(embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
출처: wordnet.princeton.edu/perl/webwn
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| operator gene |
a gene that activates the production of messenger RNA by adjacent structural genes
출처: wordnet.princeton.edu/perl/webwn
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| optic disk |
blind spot: the point where the optic nerve enters the retina; not sensitive to light
출처: wordnet.princeton.edu/perl/webwn
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| OP | a vacant or unobstructed space |
|---|---|
| OP | an aperture or hole opening into a bodily cavity |
| OP | a possible alternative |
| OP | the initial part of the introduction |
| OP | the first performance (as of a theatrical production) |
| OP | a ceremony accompanying the start of some enterprise |
| OP | an open or empty space in or between things |
| OP | opportunity especially for employment or promotion |
| OP | first or beginning |
| OP | the first line of a piece of writing (as a newspaper story) |
| OP | the first of a series of actions |
| OP | the first performance (as of a theatrical production) |