any alloy of copper and zinc, a h-m-geneous solid solution containing more than 64 percent copper.
- Alpha carotene
alpha carotene alpha carotene n. an isomer of carotene.
- Alpha cell
alpha cell alpha cell n. cells situated on the periphery of the islets of langerhans. cells containing acidophil granules in the anterior lobe of the pituitary gland. also called a cell.
- Alpha centauri system
noun a star system comprising the binary star alpha centauri a and b and proxima centauri (also called alpha centauri c), which is 0.1 light years closer to the sun. visual magnitude: 0.01 (a), 1.33 (b); spectral type: g2v (a); distance from earth: 4.3 light years also called rigil kent see also proxima
- Alpha conversion
alpha conversion theory in lambda-calculus and reduction, the renaming of a formal parameter in a lambda abstraction. this does not change the meaning of the abstraction. for example: \ x . x+1 \ y . y+1 if the actual argument to a lambda abstraction contains instances of the abstraction’s formal parameter then it is necessary […]
- Alpha decay
a radioactive process in which an alpha particle is emitted from the nucleus of an atom, decreasing its atomic number by two. noun the radioactive decay process resulting in emission of alpha particles alpha decay the radioactive decay of an atomic nucleus by emission of an alpha particle (two protons bound to two neutrons). when […]