| olfactory groove | The sagittal sulcus on the inferior or orbital surface of each frontal lobe of the cerebrum, demarcating the straight gyrus from the orbital gyri, and covered on the orbital surface by the olfactory bulb and tract. Synonym: sulcus olfactorius, olfactory groove. (05 Mar 2000) |
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| olfactory hallucination | False perception in smell. (05 Mar 2000) |
| olfactory hyperesthesia | An exaggerated or abnormally acute sense of smell. Synonym: hyperosphresia, hyperosphresis, olfactory hyperesthesia, hyperesthesia olfactoria, oxyosmia, oxyosphresia. Origin: hyper-+ G. Osme, sense of smell (05 Mar 2000) |
| olfactory hypesthesia | Diminished sense of smell. Synonym: hyposphresia, olfactory hypesthesia. Origin: hypo-+ G. Osme, smell (05 Mar 2000) |
| olfactory membrane | That part of the nasal mucosa having olfactory receptor cells and glands of Bowman. (05 Mar 2000) |
| olfactory mucosa | That portion of the nasal mucosa containing the sensory endings for olfaction; the organ of smell. (12 Dec 1998) |
| olfactory nerve | <anatomy, nerve> The olfactory nerve carries impulses for the sense of smell. Synonym: cranial nerve I. (27 Sep 1997) |
| olfactory nerves | Collective term denoting the numerous olfactory filaments: slender fascicles each composed of the thin, unmyelinated axons of 8 to 12 of the bipolar olfactory receptor cells in the olfactory portion of the nasal mucosa; the olfactory filaments pass through the cribriform plate of the ethmoid bone and enter the olfactory bulb, where they terminate in synaptic contact with mitral cells, tufted cells, and granule cells. See: olfactory tract. Synonym: nervi olfactorii, fila olfactoria, first cranial nerve, nerve of smell, olfactory fila. (05 Mar 2000) |
| olfactory neuroblastoma | <tumour> A rare, often slowly growing malignant tumour of primitive nerve cells, usually arising in the olfactory area of the nasal cavity. Synonym: olfactory esthesioneuroblastoma. (05 Mar 2000) |
| olfactory neurons | Sensory neurons from the lining of the nose. They are the only neurons that continue to divide and differentiate throughout an organisms life. (18 Nov 1997) |
| olfactory organ | The olfactory region in the superior portion of the nasal cavity. Synonym: organum olfactus, organ of smell. (05 Mar 2000) |
| olfactory pathways | Set of nerve fibres conducting impulses from olfactory receptors to the cerebral cortex. It includes the olfactory nerve, olfactory bulb, olfactory tract, olfactory tubercle, anterior perforated substance, and olfactory cortex. (12 Dec 1998) |
| olfactory peduncle | A nervelike, white band composed primarily of nerve fibres originating from the mitral cells and tufted cells of the olfactory bulb but also containing the scattered cells of the anterior olfactory nucleus. The tract is closely applied to the ventral surface of the frontal lobe, and attaches itself to the base of the cerebral hemisphere at the olfactory trigone, beyond which it extends in the form of the olfactory striae which distribute their fibres to the olfactory tubercle and, in largest number, to the olfactory cortex on and around the uncus of the parahippocampal gyrus. See: olfactory nerves. Synonym: tractus olfactorius, olfactory peduncle. (05 Mar 2000) |
| olfactory pits | The paired depressions formed when the nasal placodes come to lie below the general external contour of the developing face as a result of the rapid growth of the adjacent nasal elevations; the pit's are the primordia of the rostral portions of the nasal chambers. Synonym: olfactory pits. (05 Mar 2000) |
| olfactory placodes | Paired ectodermal placode's which come to lie in the bottom of the olfactory pits as the pits are deepened by the growth of the surrounding medial and lateral nasal processes. Synonym: nasal placodes. (05 Mar 2000) |
Synonyms :
Synonyms :
Synonyms : Oligomenorrheas
Synonyms : Oligomycin
Synonyms : DNA Arrays, DNA Chips, DNA Microchips, Gene Chips, Gene Expression Microarray Analysis, Oligodeoxyribonucleotide Array Sequence Analysis, Oligonucleotide Microarrays, Sequence Analysis, Oligonucleotide Array, cDNA Arrays, Array, DNA, Array, Oligonucleotide
| oligomenorrhea |
abnormally light or infrequent menstruation
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| oligosaccharide |
any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis
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| oligospermia |
insufficient spermatozoa in the semen
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| oliguria |
abnormally small production of urine; can be a symptom of kidney disease or obstruction of the urinary tract or edema or an imbalance of fluids and electrolytes in the body production of an abnormally small amount of urine
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| olive |
small ovoid fruit of the European olive tree; important food and source of oil evergreen tree cultivated in the Mediterranean region since antiquity and now elsewhere; has edible shiny black fruits hard yellow often variegated wood of an olive tree; used in cabinetwork one-seeded fruit of the European olive tree usually pickled and used as a relish a yellow-green color of low brightness and saturation of a yellow-green color similar to that of an unripe olive
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| ol | a man who is very old |
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| ol | (American slang) boss |
| ol | aromatic herb of temperate Eurasia and North Africa having a bitter taste used in making the liqueur absinthe |
| ol | whitish hairy plant with featherlike leaves and a few stout stems each bearing an especially handsome solitary large yellow flower head |
| ol | common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers |
| ol | vigorous deciduous climber of Europe to Afghanistan and Lebanon having panicles of fragrant green-white flowers in summer and autumn |
| ol | dense festoons of greenish-gray hairlike flexuous strands anchored to tree trunks and branches by sparse wiry roots |
| ol | a great European painter prior to 19th century |
| ol | (Judeo-Christian and Islamic religions) chief spirit of evil and adversary of God |
| ol | the extinct Germanic language of medieval Scandinavia and Iceland from about to 700 to 1350 |
| ol | the medieval Norman dialect of Old French |
| ol | a state in southeastern United States |