| arena | Origin: L. Arena, harena, sand, a sandy place. 1. The area in the central part of an amphitheater, in which the gladiators fought and other shows were exhibited; so called because it was covered with sand. 2. Any place of public contest or exertion; any sphere of action; as, the arenaof debate; the arena of life. 3. <medicine> "Sand" or "gravel" in the kidneys. Source: Websters Dictionary (01 Mar 1998) |
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| arenaceous | Sandy; of sand-like consistency. Origin: L. Arena, sand (05 Mar 2000) |
| arenation | <medicine> A sand bath; application of hot sand to the body. Origin: L. Arenatio, fr. Arena sand. Source: Websters Dictionary (01 Mar 1998) |
| Arenaviridae | <virology> Family of ssRNA viruses including Lassa virus, Lymphocytic choriomeningitis virus and the Tacaribe group of viruses, not all require arthropods for transmission, despite their inclusion in the arbovirus group. (18 Nov 1997) |
| arenaviridae infections | Virus diseases caused by the arenaviridae. (12 Dec 1998) |
| arenavirus | The only genus in the family arenaviridae. It contains two groups lcm-lassa complex viruses and tacaribe complex viruses, which are distinguished by antigenic relationships and geographic distribution. (12 Dec 1998) |
| arenga | A palm tree (Saguerus saccharifer) which furnishes sago, wine, and fibres for ropes; the gomuti palm. Origin: Malayan. Source: Websters Dictionary (01 Mar 1998) |
| arenicolite | <paleontology> An ancient wormhole in sand, preserved in the rocks. Origin: L. Arena sand + colere to cherish or live. Source: Websters Dictionary (01 Mar 1998) |
| areola | <anatomy> The circular field of dark coloured skin surrounding the nipple. (14 May 1997) |
| areola mammae | A circular pigmented area surrounding the nipple or papilla mammae; its surface is dotted with little projections due to the presence of areolar glands beneath. Synonym: areola mammae, areola papillaris, areola. (05 Mar 2000) |
| areola of nipple | A circular pigmented area surrounding the nipple or papilla mammae; its surface is dotted with little projections due to the presence of areolar glands beneath. Synonym: areola mammae, areola papillaris, areola. (05 Mar 2000) |
| areola papillaris | A circular pigmented area surrounding the nipple or papilla mammae; its surface is dotted with little projections due to the presence of areolar glands beneath. Synonym: areola mammae, areola papillaris, areola. (05 Mar 2000) |
| areola umbilicus | A pigmented ring around the umbilicus in the pregnant woman. (05 Mar 2000) |
| areolar | Pertaining to, or like, an areola; filled with interstices or areolae. <anatomy> Reolar tissue, a form of fibrous connective tissue in which the fibres are loosely arranged with numerous spaces, or areolae, between them. Source: Websters Dictionary (01 Mar 1998) |
| areolar choroiditis | Inflammation of the choroid, with prominent pigment proliferation occurring first in the macular region and then more peripherally. (05 Mar 2000) |