| arc of buehler | <radiology> Persistent embryologic anastomosis between coeliac artery and superior mesenteric artery (12 Dec 1998) |
|---|---|
| arc of riolan | <radiology> Inconstant anastomotic artery between middle and left colic aa. (12 Dec 1998) |
| arc perimeter | A perimeter consisting of a saemicircular frame at the centre of which the patient looks while a white object is moving along the arc, the exact point where it becomes visible or invisible being noted and recorded on a chart. (05 Mar 2000) |
| arc-flash conjunctivitis | Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. (05 Mar 2000) |
| arcade | An anatomical structure or structures (especially a blood vessel) taking the form of a series of arches. Origin: L. Arcus, arc, bow (05 Mar 2000) |
| arcadia | 1. A mountainous and picturesque district of Greece, in the heart of the Peloponnesus, whose people were distinguished for contentment and rural happiness. 2. Any region or scene of simple pleasure and untroubled quiet. "Where the cow is, there is Arcadia." (J. Burroughs) Origin: L. Arcadia, Gr. Source: Websters Dictionary (01 Mar 1998) |
| Arcanobacterium | A genus of nonmotile, facultatively anaerobic bacteria containing Gram-positive slender irregular rods, sometimes showing clubbed ends that may be in V formation with no filaments. These organisms are obligate parasites of the pharynx in farm animals and humans, occasionally causing lesions on the pharynx or skin. The type species is Arcanobacterium haemolyticum. (05 Mar 2000) |
| Arcanobacterium haemolyticum | A species that causes pharyngitis and chronic skin ulcers in humans as well as farm animals. (05 Mar 2000) |
| arcanum | Origin: L, fr. Arcanus closed, secret, fr. Arca chest, box, fr. Arcere to inclose. See Ark. 1. A secret; a mystery; generally used in the plural. "Inquiries into the arcana of the Godhead." (Warburton) 2. <medicine> A secret remedy; an elixir. Source: Websters Dictionary (01 Mar 1998) |
| arcate | Curved like a bow. (09 Oct 1997) |
| arch | <dentistry> Collectively, either the teeth or the basal bone of either jaw. (08 Jan 1998) |
| arch bar | Any one of several types of wires, bar's, or splints conforming to the arch of the teeth, extending from one side of the arch to the other and located labially, or lingually; used for the treatment of jaw fractures and/or stabilization of injured teeth. (05 Mar 2000) |
| arch length | The amount of space required for the permanent teeth as measured from the mesial aspect of the first molar on one side to the mesial aspect of the first molar on the opposite side, as measured through the contact points along an imaginary line of the dental arch. (05 Mar 2000) |
| arch length deficiency | The difference between the available circumference of the dental arch and that required to accommodate the succedaneous teeth in proper alignment. (05 Mar 2000) |
| arch of cricoid cartilage | The narrow part of the cartilage that encircles the air passage anterior to the lamina. Synonym: arcus cartilaginis cricoideae. (05 Mar 2000) |