| ATC | activated thymus cell; around the clock |
|---|---|
| CP | candle power; capillary pressure; cardiac pacing; cardiac performance; cardiopulmonary; caudate puta... |
| ALARM | adjustable leg and ankle repositioning mechanism |
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
| DASH | Distress Alarm for the Severely Handicapped |
| CDT | Clock Drawing Test |
|---|---|
| CEH | Cervicogenic headache |
| CDH | Chronic daily headache |
| CH | Cluster Headache |
| IHS | International Headache Society |
| alarm | 1. A summons to arms, as on the approach of an enemy. "Arming to answer in a night alarm." (Shak) 2. Any sound or information intended to give notice of approaching danger; a warming sound to arouse attention; a warning of danger. "Sound an alarm in my holy mountain." (Joel II. 1) 3. A sudden attack; disturbance; broil. "These home alarms." "Thy palace fill with insults and alarms." (Pope) 4. Sudden surprise with fear or terror excited by apprehension of danger; in the military use, commonly, sudden apprehension of being attacked by surprise. "Alarm and resentment spread throughout the camp." (Macaulay) 5. A mechanical contrivance for awaking persons from sleep, or rousing their attention; an alarum. Alarm bell, a bell that gives notice on danger. Alarm clock or watch, a clock or watch which can be so set as to ring or strike loudly at a prearranged hour, to wake from sleep, or excite attention. Alarm gauge, a contrivance attached to a steam boiler for showing when the pressure of steam is too high, or the water in the boiler too low. Alarm post, a place to which troops are to repair in case of an alarm. 6. To call to arms for defense; to give notice to (any one) of approaching danger; to rouse to vigilance and action; to put on the alert. 7. To keep in excitement; to disturb. 8. To surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear. "Alarmed by rumors of military preparation." (Macaulay) Synonym: Fright, affright, terror, trepidation, apprehension, consternation, dismay, agitation, disquiet, disquietude. Alarm, Fright, Terror, Consternation. These words express different degrees of fear at the approach of danger. Fright is fear suddenly excited, producing confusion of the senses, and hence it is unreflecting. Alarm is the hurried agitation of feeling which springs from a sense of immediate and extreme exposure. Terror is agitating and excessive fear, which usually benumbs the faculties. Consternation is overwhelming fear, and carries a notion of powerlessness and amazement. Alarm agitates the feelings; terror disorders the understanding and affects the will; fright seizes on and confuses the sense; consternation takes possession of the soul, and subdues its faculties. See Apprehension. Origin: F. Alarme, alarmer. It. All' arme to arms ! fr. L. Arma, pl, arms. See Arms, and cf. Alarum. Source: Websters Dictionary (01 Mar 1998) |
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| alarm reaction | The various phenomena, e.g., stimulated endocrine activity, which the body exhibits as an adaptive response to injury or stress; first phase of the general adaptation syndrome. (05 Mar 2000) |
| biological clock | <biology, physiology> An internal biological mechanism which controls certain biological rhythms and biocycles, such as metabolism, sleep cycles, photosynthesis. (21 Mar 1998) |
| circadian clock | <physiology> A biological timing mechanism that controls cell synchronisation (a entire population of cells divides simultaneously). (09 Oct 1997) |
| molecular clock | This term has two separate uses. 1. <molecular biology> The rate of fixation of mutations in DNA and thus times the rate of genetic diversification. 2. <cell biology> A biological system capable of maintaining up a timing rhythm or pulse. All such clocks are thought to be entrained by a natural oscillator such as the diurnal rhythm. (18 Nov 1997) |
| ten-o'clock | <botany> A plant, the star-of-Bethlehem. See Star. Source: Websters Dictionary (01 Mar 1998) |
| four-o'clock | 1. <botany> A plant of the genus Mirabilis. There are about half a dozen species, natives of the warmer parts of America. The common four-o'clock is M. Jalapa. Its flowers are white, yellow, and red, and open toward sunset, or earlier in cloudy weather; hence the name. It is also called marvel of Peru, and afternoon lady. 2. <zoology> The friar bird; so called from its cry, which resembles these words. Source: Websters Dictionary (01 Mar 1998) |
| lens clock | A device for measuring the radii of the curvature of a spectacle lens. Synonym: lens clock. Origin: Geneva, Switzerland (05 Mar 2000) |
| benign headache | A benign form of headache that results from the painful spasm (muscle tightness) and inflammation of muscles of the head and neck. Tension headache is one of the most common forms of headache. Spasm and contraction of the head and neck muscles may occur in response to fatigue, overuse, eye strain, excessive smoking, stress, anxiety or depression. Sleeping in an abnormal position or prolonged work involving immobilisation of the neck in one position (typing, computers, etc.) are considered common triggers. Exercising and stretching the muscles of the head and neck can reduce the occurrence of muscle tension headaches. (27 Sep 1997) |
| bilious headache | <disease> An often familial symptom complex of periodic attacks of vascular headache, usually temporal and unilateral in onset, commonly associated with irritability, nausea, vomiting, constipation or diarrhoea and often photophobia, attacks are preceded by constriction of the cranial arteries, usually with resultant prodromal sensory (especially ocular) symptoms and commence with the vasodilation that follows. Origin: Gr. Hemikrania = an affection of half of the head (18 Nov 1997) |
| blind headache | <disease> An often familial symptom complex of periodic attacks of vascular headache, usually temporal and unilateral in onset, commonly associated with irritability, nausea, vomiting, constipation or diarrhoea and often photophobia, attacks are preceded by constriction of the cranial arteries, usually with resultant prodromal sensory (especially ocular) symptoms and commence with the vasodilation that follows. Origin: Gr. Hemikrania = an affection of half of the head (18 Nov 1997) |
| vacuum headache | Headache due to closure of the frontal sinus. (05 Mar 2000) |
| vascular headache | <neurology> A group of headaches felt to involve abnormal sensitivity of the blood vessels (arteries) in the brain to various triggers which results in rapid changes in the artery size due to spasm (constriction). Other arteries in the brain and scalp then open (dilate), and throbbing pain is perceived in the head. Migraine headaches are the most common type of vascular headache. (07 Mar 2000) |
| reflex headache | A headache secondary to another organic condition. Synonym: reflex headache. (05 Mar 2000) |
| migraine headache | The most common type of vascular headache involving (it is thought). Abnormal sensitivity of blood vessels (arteries) in the brain to various triggers resulting in rapid changes in the artery size due to spasm (constriction). Other arteries in the brain and scalp then open (dilate), and throbbing pain is perceived in the head. The tendency to migraine is inherited and appears to involve serotonin, a chemical in the brain involved in the transmission of nerve impulses that trigger the release of substances in the blood vessels that in turn cause the pain of the migraine. These nerve impulses cause the flashing lights and other sensory phenomena known as an aura that may accompany a migraine. Not all severe headaches are migraines and not all migraines are severe. (12 Dec 1998) |
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