| PR | by way of the rectum [Lat. per rectum]; far point [of accommodation] [Lat. punctum remotum]; palindr... |
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| PRP | physiologic rest position; pityriasis rubra pilaris; platelet-rich plasma; polyribosyl ribitol phosp... |
| REPS | reactive extensor postural synergy |
| dim | dimension; diminished |
| EDD | effective drug duration; electron dense deposit; end-diastolic dimension; esophageal detection devic... |
| postural reflex | Responses that control the position of the trunk and extremities. See: righting reflexes. Synonym: static reflexes. (05 Mar 2000) |
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| postural set | An overall motor readiness to respond, as in a runner instructed to get set and on the mark. (05 Mar 2000) |
| postural syncope | Syncope upon assuming an upright position; caused by failure of normal vasoconstrictive mechanisms. (05 Mar 2000) |
| postural tremor | Tremor present when the limbs or trunk are kept in certain positions and when they are moved actively, usually due to near-synchronous rhythmic bursts in opposing muscle groups. Synonym: static tremor. (05 Mar 2000) |
| postural version | Nonmanual version obtained by changing the position of the mother. (05 Mar 2000) |
| postural vertigo | Light-headedness that appears particularly in elderly people with change of position usually from lying or sitting to standing; due to orthostatic hypotension. (05 Mar 2000) |
| drainage, postural | Therapeutic drainage in bronchopulmonary diseases in which there is copious mucus secretion, such as chronic bronchitis, bronchiectasis, pulmonary abscess, or cystic fibrosis. The patient is placed with head downward, so that the trachea is inclined downward and below the affected area. It may be done in 15- to 20-minute sessions or by having the patient sleep in a head-down position. The therapy may be used in conjunction with forced expiration, bronchodilator agents, or expectorants. (12 Dec 1998) |
| vertical | 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. "Charity . . . Is the vertical top of all religion." (Jer. Taylor) 2. Perpendicular to the plane of the horizon; upright; plumb; as, a vertical line. <astronomy> Vertical angle, an angle measured on a vertical circle, called an angle of elevation, or altitude, when reckoned from the horizon upward, and of depression when downward below the horizon. <botany> Vertical anthers The plane passing through the point of sight, and perpendicular to the ground plane, and also to the picture. Vertical sash, a sash sliding up and down. Cf. French sash, under 3d Sash. Vertical steam engine, a steam engine having the crank shaft vertically above or below a vertical cylinder. Origin: Cf. F. Vertical. See Vertex. 1. Vertical position; zenith. 2. <mathematics> A vertical line, plane, or circle. Prime vertical, Prime vertical dial. See Prime. Source: Websters Dictionary (01 Mar 1998) |
| vertical axis | In dentistry, the line around which the working side condyle rotates in the horizontal plane during mandibular movement. (05 Mar 2000) |
| vertical classification | <zoology> Classification which stresses common descent and tends to unite ancestral and descendant groups of a phyletic line in a single higher taxon, separating them from contemporaneous taxa having reached a similar grade of evolutionary change. Compare: Horizontal classification. (09 Jan 1998) |
| vertical displacement event | Disruption which occurs because plasma is not adequately stabilised against vertical motions. (09 Oct 1997) |
| vertical elastic | Elastic material used in a direction perpendicular to the occlusal plane, connecting one arch wire to the other, and usually used to improve intercuspation. (05 Mar 2000) |
| vertical growth phase | Spread of melanoma cells from the epidermis into the dermis and later the subcutis, from which site metastasis may take place. (05 Mar 2000) |
| vertical heart | Loosely descriptive of the heart's electrical axis when this is directed at approximately +90 |
| vertical hymen | A hymen in which the opening is perpendicular. (05 Mar 2000) |