Opaque: Impenetrable by visible light rays or by other electromagnetic
radiations such as X-rays. .
Operation: An act of surgery performed with instruments.
Operator: (1) One who performs an operation. (2) Specific sites regulating structural gene activity.
Operculum: A lid or coveriug structure.
Operon: A gene sequence under the coordinated control of a single operator.
Ophthalmagra : Sudden pain in the eye.
Ophthalmalgia (Ophthalmodynia) : Pain in the eye.
Ophthalmia: Severe inflammation of the eye.
Ophthalmitis : Inflammation of the eye.
Ophthalmonyositis : Inflammation of the eye muscles. Ophthalmopathy: Any disease of
the eye. .
Ophthalmoplegia: Paralysis of the eye muscles.
Ophthalmorrhagia : Haemorrhage from the eye.
O..hthalmoscope : An instrument to exaniihe the interior of the eye. Ophthalmotomy : Tbe operation of incising the eyeball. Ophthalmovascular : Pertaining to the blood vessels of the eye.
Opian (Opianine): Noscapine. Opiate: (1) A remedy containing
,opium. (2) Any drug that induces sleep.
Opioid : (1) A synthetic narcotic that has opiate like activities but is not
derived from opium. (2) Denoting naturally occurring peptides.
Opium: An air-dried, milky juice of the unripe seed-capsules of Papaver somniferum which is a source of morphine.
Optical activity: The property of rotating the plane of polarized light due to the presence of an asymmetric carbon, measured by a polarimeter.
Optical isomer: Either of two kinds of optically active three- dimensional isomers, represented by mirror-image structures.
Optical rotation: The chain of direction of the plane of polarized light as it passes through a molecule containing one or more asymmetric carbon atoms.
Optimal: The best; the most favourable.
Optimum
condition.
Oral: Taken through the mouth. Orbicular: Circular in outline; nearly rounded; round.
Orbiculus : A structure shaped like a small circle.
Orbit:' The bony cavity that contains
the eyeball.
Orbital: A region in an atom that may contain opposite spin electrons. Orchidic (orchic) : Pertaining to the testes.
Orchiectomy: Excision of testes. Orchiopathy : Any disease of the testes.
Orchiditis (Orchitis) : Inflammation of a testes.
Order: A taxonomic category subordinate to a class; the main division under class and superior to family.
Orexia: Appetite.
Organ: An independent part of the body that performs a special function.
Most
favourable
Organ tropism: Selective attack of a pathogen on a particular organ or tissue.
Organella: Any of the membranebound organized cytoplasmic structures of distinctive morphology, chemical constituents and function
present in all eukaryotic cells; it is a
unit subsystem of a cell, e.g., mitochondria and chromosomes.
Organic: (1) Pertaining to an organ. (2) Having an organized structure. (3) Arising from an organism. (4) Chemical substances containing carbon. I
Organic acid: Any acid containing one or more carboxylic (COOH) group.
Organic chemistry: A branch of chemistry dealing with substances containing carbon compounds.
Organism: Any living thing.
Organized drugs: The drugs obtained from the. direct parts of the
plants and containing cellular tissues. Organogenesis: The origin and development of organs.
Organoleptic: Making an impre~sion on an organ of special sense; consumer, testing procedures for blood products, perfumes, wines, flavours, etc.
Organomercurial: Any mercurycontaining organic compound. Organometallic: Consisting of a metal in combination with an organic radical.
Organopathy : Organic disease. Organum: An organ. Orientation. : Awareness of one's environment, with reference to place, time and people. |
