| ccDNA | closed circle deoxyribonucleic acid |
|---|---|
| WIBC | Wiggins Interpresonal Behavior Circle |
| h. | hour; ½Ã°£ |
| o.h. | omii hora; every hour; ¸Å½Ã°£ |
| q.h. | quaque hora; Every Hour; ¸Å½Ã°£ |
| PCAR | presumed circle area ratio |
|---|---|
| RC | rolling circle |
| RCR | rolling circle replication |
| H | 1-hour |
| ACH | air changes per hour |
| milligram hour | An obsolete term for a unit of exposure in radium therapy, i.e., the application of 1 milligram of radium during 1 hour. Synonym: milligramage. (05 Mar 2000) |
|---|---|
| hour | 1. <physics> The twenty-fourth part of a day; sixty minutes. 2. The time of the day, as expressed in hours and minutes, and indicated by a timepiece; as, what is the hour? at what hour shall we meet? 3. Fixed or appointed time; conjuncture; a particular time or occasion; as, the hour of greatest peril; the man for the hour. "Woman, . . . Mine hour is not yet come." (John II. 4) "This is your hour, and the power of darkness." (Luke xxii. 53) 4. A measure of distance traveled. "Vilvoorden, three hours from Brussels." (J. P. Peters) After hours, after the time appointed for one's regular labour. Canonical hours. See Canonical. 5. <astronomy> Hour angle, a line on which the shadow falls at a given hour; the intersection of an hour circle which the face of the dial. Hour plate, the plate of a timepiece on which the hours are marked; the dial. Sidereal hour, the twenty-fourth part of a sidereal day. Solar hour, the twenty-fourth part of a solar day. The small hours, the early hours of the morning, as one o'clock, two o'clock, etc. To keep good hours, to be regular in going to bed early. Origin: OE. Hour, our, hore, ure, OF. Hore, ore, ure, F. Heure, L. Hora, fr. Gr, orig, a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See Year, and cf. Horologe, Horoscope. Source: Websters Dictionary (01 Mar 1998) |
| kilowatt-hour | <unit> A standard measure of electrical energy, equals one kilowatt of power delivered for one hour. Equivalent to 3.6 million joules. For example, 1 kWh will light a 100-watt light bulb for 10 hours. 1 kWh = 3,413 Btu. Abbreviation: kWh (05 Dec 1998) |
| 24-hour cardiac monitor | <apparatus> A recording device, worn by the patient for the purpose of monitoring the hearts rhythm and rate, over a period of 24 hours. (27 Sep 1997) |
| arterial circle of cerebrum | An anastomotic "circle" of arteries (roughly pentagonal in outline) at the base of the brain, formed, sequentially and in anterior to posterior direction, by the anterior communicating artery, the two anterior cerebral, the two internal carotid, the two posterior communicating, and the two posterior cerebral arteries. Synonym: circulus arteriosus cerebri, circle of Willis. (05 Mar 2000) |
| articular vascular circle | An anastomosis of vessels encircling a joint. See: articular vascular network. Synonym: circulus articularis vasculosus. (05 Mar 2000) |
| Baudelocque's uterine circle | A constriction located at the junction of the thinned lower uterine segment with the thick retracted upper uterine segment, resulting from obstructed labour; this is one of the classic signs of threatened rupture of the uterus. Synonym: Bandl's ring, Baudelocque's uterine circle, Scanzoni's second os. (05 Mar 2000) |
| Pagenstecher's circle | In the case of a freely movable abdominal tumour, the mass is moved throughout its entire range, its position at intervals being marked on the abdominal wall; when these points are joined, a circle is formed, the centre of which marks the point of attachment of the tumour. (05 Mar 2000) |
| vascular circle | The circle around the mouth formed by the inferior and superior labial arteries. Synonym: areolar venous plexus. (05 Mar 2000) |
| vascular circle of optic nerve | <anatomy, nerve> A network of branches of the short ciliary arteries on the sclera around the point of entrance of the optic nerve. Synonym: circulus vasculosus nervi optici, circulus arteriosus halleri, circulus zinnii, Haller's circle, Zinn's corona, Zinn's vascular circle. (05 Mar 2000) |
| Ramsden circle | <microscopy> The circular spot of light formed at that distance above the eyepiece where the chief image forming rays cross, the back focal plane of the eyepiece. The objective back focal plane is in conjugate focus in this same plane. In visual microscopy, the point where the pupil of the eye is placed. (05 Aug 1998) |
| venous circle of mammary gland | areolar venous plexus |
| Carus' circle | An imaginary curved line obtained from a mathematical formula, supposed to indicate the outlet of the pelvic canal. Synonym: Carus' circle. (05 Mar 2000) |
| vicious circle | The mutually accelerating action of two independent diseases or phenomena, or of a primary and secondary affection, the passage of food, after a gastroenterostomy, from the artificial opening through the intestinal loop by antiperistaltic action and back into the stomach again by the pyloric orifice, or the reverse. (05 Mar 2000) |
| cerebral arterial circle | The roughly pentagonally shaped circle of vessels on the ventral aspect of the brain in the area of the optic chiasm, hypothalamus, and interpeduncular fossa. See: circle of Willis. (05 Mar 2000) |
| hour circle | a great circle on the celestial sphere that passes through both celestial poles |
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