A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.
A recording of the electrical activity of the heart. Abbreviated ECG and EKG. An ECG is a simple, noninvasive procedure. Electrodes are placed on the skin of the chest and connected in a specific order to a machine that, when turned on, measures electrical activity all over the heart. Output usually appears on a long […]
Antiestrogen: A substance that can prevent the full expression of estrogen. Antiestrogens act by exerting antagonistic effects on target tissues (androgens and progestogens act in this way) or by competing with estrogens for access to receptor sites located on the cell surface. For example, the drug tamoxifen (brand name: Nolvadex) is an antiestrogen that is […]
- Antifreeze poisoning
Antifreeze poisoning: Poisoning from antifreeze which today is usually ethylene glycol — a clear, colorless, odorless liquid with a sweet taste — that can produce dramatic and dangerous toxicity. Ethylene glycol is found most commonly in automotive cooling systems, and hydraulic brake fluid. In an industrial setting it is also used as a solvent and […]
Antifungal: A medication that limits or prevents the growth of yeasts and other fungal organisms.