| ascus | <fungus> Elongated spore case containing 4 or 8 haploid sexual ascospores of ascomycete fungi (which include yeasts). (18 Nov 1997) |
|---|---|
| ASD | <cardiology> An inherited condition where there is nonclosure of the foramen ovale at birth, resulting in congenital heart disease. Usually asymptomatic until the third or fourth decades of life. Symptoms include exertional shortness of breath, fatigue and palpitations. Acronym: ASD (12 Jan 1998) |
| asecretory | Without secretion. (05 Mar 2000) |
| Aselli | (AselliusAsellio) Gasparo, Italian anatomist at Cremona, 1581-1626. See: Aselli's gland, Aselli's pancreas. (05 Mar 2000) |
| Aselli's gland | A single large lymph node ventral to the abdominal aorta that receives all the lymph from the intestines in many smaller mammals. Synonym: Aselli's pancreas. (05 Mar 2000) |
| Aselli's pancreas | A single large lymph node ventral to the abdominal aorta that receives all the lymph from the intestines in many smaller mammals. Synonym: Aselli's pancreas. (05 Mar 2000) |
| asemasia | Asaemia Synonym: asymbolia. Origin: G. A-priv. + semasia, the giving of a signal, fr. Sema, sign (05 Mar 2000) |
| asepalous | <botany> Without sepals. (09 Oct 1997) |
| asepsis | 1. <microbiology> Freedom from infection. 2. <technique> The prevention of contact with microorganisms. Origin: Gr. Sepesthai = to decay (18 Nov 1997) |
| aseptate | In fungi, a term describing absence of cross walls in a hyphal filament or a spore. Origin: G. A-priv. + L. Saeptum, a partition (05 Mar 2000) |
| aseptic | <microbiology> Freedom from infection or septic material, sterile. (18 Nov 1997) |
| aseptic bursitis | Inflammation of a bursa that is not caused by infection. A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as bursitis. most commonly this is not an infectious condition (aseptic bursitis). (12 Dec 1998) |
| aseptic fever | Fever accompanied by malaise due to absorption of dead but not infected tissue following an injury. (05 Mar 2000) |
| aseptic meningitis | <neurology> A meningeal reaction in the cerebrospinal fluid sometimes occurring in the absence of an infecting organism. It can be due to a virus, foreign substance, diagnostic or therapeutic procedure, or to a tumour or a septic focus within the skull or spinal canal. <virology> When due to a virus, it is seen most often in those under 30 years of age. Peak time for infection is in late summer. Majority of cases are caused by the Coxsackie and echovirus. (21 Jun 1999) |
| aseptic necrosis | <orthopaedics, pathology> Condition in which poor blood supply to an area of bone leads to bone death. Also called avascular necrosis and osteonecrosis. (12 Dec 1998) |