| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
|---|---|
| ARAO | angiographic area of right anterior oblique projection |
| ARV | acquired immunodeficiency syndrome-related virus; anterior right ventricle; avian reovirus |
| ASA | acetylsalicylic acid; active systemic anaphylaxis; Adams-Stokes attack; American Society of Anesthes... |
| asc | ascending; anterior subcapsular |
| anterior tibiofibular ligament | <anatomy> The ligament that binds the anterior aspect of the tibiofibular syndesmosis. Synonym: ligamentum tibiofibulare anterius. (05 Mar 2000) |
|---|---|
| anterior tibiotalar ligament | <anatomy> The part of the medial or deltoid ligament that extends from the medial malleolus to the neck of the talus. Synonym: pars tibiotalaris anterior ligamenti medialis, anterior talotibial ligament, anterior tibiotalar part of deltoid ligament, ligamentum medialis, ligamentum talotibiale anterius. (05 Mar 2000) |
| anterior tibiotalar part of deltoid ligament | <anatomy> The part of the medial or deltoid ligament that extends from the medial malleolus to the neck of the talus. Synonym: pars tibiotalaris anterior ligamenti medialis, anterior talotibial ligament, anterior tibiotalar part of deltoid ligament, ligamentum medialis, ligamentum talotibiale anterius. (05 Mar 2000) |
| anterior triangle of neck | The area of the neck bounded by the mandible, the anterior border of the sternocleidomastoid muscle, and the anterior midline of the neck; it is subdivided into carotid, muscular, submandibular, and submental triangles. Synonym: anterior region of neck, regio cervicalis anterior, trigonum cervicale anterius. (05 Mar 2000) |
| anterior tubercle of atlas | A conical protuberance on the anterior surface of the arch of the atlas. Synonym: tuberculum anterius atlantis. (05 Mar 2000) |
| anterior tubercle of cervical vertebrae | The anterior projection from the transverse process. Synonym: tuberculum anterius vertebrarum cervicalium. (05 Mar 2000) |
| anterior tubercle of thalamus | anterior thalamic tubercle |
| anterior tympanic artery | <anatomy, artery> Origin, maxillary; distribution, middle ear; anastomoses, tympanic branches of internal carotid and ascending pharyngeal and stylomastoid. Synonym: arteria tympanica anterior, glaserian artery. (05 Mar 2000) |
| anterior urethra | The portion of urethra distal to urogenital diaphragm (external sphincter). (05 Mar 2000) |
| anterior urethral valve | A crescentic horizontal fold in the proximal spongy urethra. (05 Mar 2000) |
| anterior urethritis | Inflammation of the portion of the urethra anterior to the triangular ligament. (05 Mar 2000) |
| anterior uveitis | Inflammation involving the ciliary body and iris. (05 Mar 2000) |
| anterior vein of septum pellucidum | Vein draining the anterior part of the transparent septum; it empties into the superior thalamostriate vein. Synonym: vena septi pellucidi anterior. (05 Mar 2000) |
| anterior vertebral scalloping | <radiology> Hodgkin's disease, aortic aneurysm, tuberculosis of the spine (12 Dec 1998) |
| anterior vertebral vein | <anatomy, vein> The small vein that accompanies the ascending cervical artery; it opens below into the vertebral vein. Synonym: vena vertebralis anterior. (05 Mar 2000) |