| opsomania | <psychiatry> A longing for a particular article of diet, or for highly seasoned food. Origin: G. Opson, seasoning, + mania, frenzy (05 Mar 2000) |
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| opsonation | A catering; a buying of provisions. Origin: L. Opsonatio. Source: Websters Dictionary (01 Mar 1998) |
| opsonic | Relating to opsonins or to their utilization. (05 Mar 2000) |
| opsonic index | A value that indicates the relative content of opsonin in the blood of a person with an infectious disease, as evaluated in vitro in comparison with presumably normal blood; the opsonic index is calculated from the following equation: phagocytic index of normal serum ÷ phagocytic index of test serum = 1 ÷ x, where x represents the opsonic index. (05 Mar 2000) |
| opsonin | <protein> Substance that binds to the surface of a particle and enhances the uptake of the particle by a phagocyte. Probably the most important in mammals derive from complement (C3b or C3bi) or immunoglobulins which are bound through the Fc receptor). (18 Nov 1997) |
| opsonisation | A process through which a cell or microbe is treated with opsonin to make it more vulnerable to being engulfed by a phagocyte. Often done simply by incubating particles (e.g. Zymosan) with fresh serum. (13 Oct 1997) |
| opsonization | The process by which bacteria are altered in such a manner that they are more readily and more efficiently engulfed by phagocytes. (05 Mar 2000) |
| opsonocytophagic | Pertaining to the increased efficiency of phagocytic activity of the leukocytes in blood that contains specific opsonin. Origin: opsonin + G. Kytos, a hollow (cell), + phago, to eat (05 Mar 2000) |
| opsonometry | Determination of the opsonic index or the opsonocytophagic activity. (05 Mar 2000) |
| opsonophilia | The condition in which bacteria readily unite with opsonins, thereby sensitizing them for more effective phagocytosis. Origin: opsonin + G. Phileo, to love (05 Mar 2000) |
| opsonophilic | Pertaining to, characterised by, or resulting in opsonophilia. (05 Mar 2000) |
| optic | Of or pertaining to the eye. Origin: Gr. Optikos = of or for sight (18 Nov 1997) |
| optic agnosia | The inability to recognise objects by sight; usually caused by bilateral parieto-occipital lesions. Synonym: optic agnosia. (05 Mar 2000) |
| optic ataxia | An inability to guide the hand toward an object using visual information; seen in Balint's syndrome. (05 Mar 2000) |
| optic atrophy | Atrophy of the optic disk resulting from degeneration of the nerve fibres of the optic nerve and optic tract. (12 Dec 1998) |
| ophthalmodonesis |
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| ophthalmodynamometer |
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| ophthalmodynamometry |
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| ophthalmoeikonometer |
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| ophthalmography |
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| OP | the performance of some composite cognitive activity |
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| OP | (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction) |
| OP | process or manner of functioning or operating |
| OP | the state of being in effect or being operative |
| OP | the portion of a set of operation descriptions that specifies the operation to be performed |
| OP | the United States and its allies defeated Iraq in a ground war that lasted 100 hours (1991) |
| OP | being in effect or operation |
| OP | (military) of or intended for or involved in military operations |
| OP | fit or ready for use or service |
| OP | pertaining to a process or series of actions for achieving a result |
| OP | loss of military equipment in field operations |
| OP | loss of military equipment in field operations |