| horizontal atrophy | A progressive loss of alveolar and supporting bone surrounding the teeth, beginning at the most coronal level of the bone. Synonym: horizontal resorption. (05 Mar 2000) |
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| horizontal beam film | A radiograph made with the central axis of the X-ray beam parallel to the floor, able to show an air-fluid level. (05 Mar 2000) |
| horizontal cell | A type of nonspiking interneuron found in the retina, named for its morphology. Horizontal cells process the information from a large number of photoreceptors and synapse onto ganglion cells and other cell types in the retina. (18 Nov 1997) |
| horizontal cell of Cajal | A small fusiform cell found in the superficial layer of the cerebral cortex with its long axis placed horizontally. Synonym: Cajal's cell. (05 Mar 2000) |
| horizontal cells of retina | Cell's in the outer part of the inner nuclear layer of the retina that lie with their axes more or less parallel with the surface. They are thought to connect the rods of one part of the retina with cones of another part. (05 Mar 2000) |
| horizontal classification | <zoology> Classification which stresses grouping together taxa in a similar stage of evolution, rather than location on the same phyletic line. See: Vertical classification. (09 Jan 1998) |
| horizontal fissure of cerebellum | Horizontal fissure that divides the ansiform lobule into its major parts, crus I (superior semilunar lobule) and crus II (inferior semilunar lobule). Synonym: fissura horizontalis cerebelli, great horizontal fissure. (05 Mar 2000) |
| horizontal fissure of right lung | The deep fissure that separates the upper and middle lobes of the right lung. Synonym: fissura horizontalis pulmonis dextri, horizontal fissure of right lung, minor fissure. (05 Mar 2000) |
| horizontal fracture | A fracture of the facial bones in which there is a horizontal fracture at the base of the maxillae above the apices of the teeth. Synonym: horizontal fracture, Le Fort I fracture. (05 Mar 2000) |
| horizontal growth phase | An early stage of development of cutaneous melanoma by intraepidermal spread of atypical melanocytes. (05 Mar 2000) |
| horizontal osteotomy | An osteotomy performed intraorally for genioplasty; the inferior aspect of the anterior mandible is advanced or retruded by movement of the free segment. (05 Mar 2000) |
| horizontal overlap | The projection of the upper anterior and/or posterior teeth beyond their antagonists in a horizontal direction. Synonym: overjet, overjut. (05 Mar 2000) |
| horizontal part of duodenum | pars horizontalis duodeni, inferior part of duodenum, pars inferior duodeni |
| horizontal part of facial canal | First portion of facial canal, between beginning of canal (at the introitus of the facial canal at the end of the internal auditory meatus) and the point at which it turns to descend, beginning the descending part. There are two components (crura) of the horizontal part: the medially-located, anteriorly-directed medial crus and the laterally-placed, posteriorly-directed lateral crus, the two being continuous at a sharp bend, the genu of the facial canal. This lateral part is where the genicular ganglion is located and which communicates with the middle cranial fossa via the hiatus of the facial canal, through which the greater superficial petrosal nerve passes. (05 Mar 2000) |
| horizontal plane | A plane across the body at right angles to the coronal and sagittal plane's. Synonym: horizontal plane. (05 Mar 2000) |
Synonyms : Ectopic Hormones
Synonyms :
Synonyms : Bernard's Syndrome, Claude Bernard-Horner Syndrome, Horner Syndrome, Acquired, Horner Syndrome, Central, Horner's Syndrome, Pupil, Ophthalmoplegia, Sympathetic Ocular, Ptosis Sympathetic, Sympathetic Ocular-Ophthalmoplegia, Acquired Horner Syndrome
Synonyms : Horn
Synonyms : Equine Diseases, Disease, Equine, Disease, Horse, Diseases, Equine, Diseases, Horse, Equine Disease, Horse Disease
| horny |
aroused: feeling great sexual desire; "feeling horny" having horns or hornlike projections; "horny coral"; "horny (or horned) frog" corneous: made of horn (or of a substance resembling horn)
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| hormone |
the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
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| horseradish peroxidase |
an enzyme used in immunohistochemistry to label antigens and their antibodies
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| hormone replacement therapy |
hormones (estrogen and progestin) are given to postmenopausal women; believed to protect them from heart disease and osteoporosis
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| horn |
a noisemaker (as at parties or games) that makes a loud noise when you blow through it one of the bony outgrowths on the heads of certain ungulates a noise made by the driver of an automobile to give warning; a high pommel of a Western saddle (usually metal covered with leather) cornet: a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves any hard protuberance from the head of an organism that is similar to or suggestive of a horn the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails an alarm device that makes a loud warning sound French horn: a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves automobile horn: a device on an automobile for making a warning noise stab or pierce with a horn or tusk; "the rhino horned the explorer"
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| hor | a moving crowd |
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| hor | a nomadic community |
| hor | an infection of the sebaceous gland of the eyelid |
| hor | annual to perennial grasses of temperate northern hemisphere and South America: barley |
| hor | barley grown for its highly ornamental flower heads with delicate long silky awns |
| hor | European annual grass often found as a weed in waste ground especially along roadsides and hedgerows |
| hor | annual barley native to western North America and widespread in southern United States and tropical America |
| hor | grass yielding grain used for breakfast food and animal feed and in malt beverages |
| hor | a candy that is flavored with an extract of the horehound plant |
| hor | any of various aromatic herbs of the genus Marrubium |
| hor | the range of interest or activity that can be anticipated |
| hor | the line at which the sky and Earth appear to meet |