Asbestos
Asbestos: A natural material made up of tiny fibers that is used as thermal insulation. Inhalation of asbestos fibers can lead to asbestosis and mesothelioma.
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- ASA (drug caution code)
ASA (drug caution code): Abbreviation on a medication that indicates it contains acetylsalicylic acid (aspirin). This special caution code is intended to be a warning for patients with specific medical conditions. If you see it or another possible caution code on a prescription, talk to your pharmacist about it before using the medicine. While not […]
- Ataxia-telangiectasia
Ataxia-telangiectasia: A progressive disease characterized by degeneration of the nervous system manifest by poor coordination and balance (cerebellar ataxia), red eyes due to widening of small blood vessels in the conjunctiva (ocular telangiectasia), and recurrent sinus and lung infections. Abbreviated AT. Patients with AT have a striking predisposition to leukemia and lymphoma and are extremely […]
- ATCC (American Type Culture Collection)
ATCC (American Type Culture Collection): Although little known to the general public, the American Type Culture Collection (ATCC) is a key resource for medical research. It is the world’s premier biological culture repository. The ATCC assures medical and other biological scientists a reliable source of over 60,000 authenticated, viable cultures of: Algae & Protozoa Bacteria […]
- Atelectasis
Atelectasis: Failure of full expansion of the lung at birth, or lung collapse thereafter. Also known as collapsed lung.
- Atelectasis, secondary
Atelectasis, secondary: Partial or complete collapse of a previously expanded lung. Secondary atelectasis may occur when full chest expansion is difficult, such as after chest surgery.