amphoterism am·pho·ter·ism (ām’fə-těr’ĭz’əm, ām-fŏt’ə-rĭz’əm)
The quality of exhibiting the characteristics of an acid and a base and having the capacity to react either as an acid or a base.
- Amphotropic virus
amphotropic virus amphotropic virus am·pho·trop·ic virus (ām’fə-trŏp’ĭk, -trō’pĭk) n. An oncornavirus that does not produce disease in its natural host, but does replicate in tissue culture cells of the host species and in cells from other species.
a broad-spectrum semisynthetic penicillin, C 16 H 19 N 3 O 4 S, effective against certain susceptible Gram-positive and Gram-negative bacteria. noun a semisynthetic penicillin used to treat various infections ampicillin am·pi·cil·lin (ām’pĭ-sĭl’ĭn) n. A semisynthetic of penicillin effective against gram-negative and gram-positive bacteria and used in treating infections of the intestinal, urinary, and respiratory […]
(def 2). to excite or energize (usually followed by up): We were so amped up for the game that we forgot to eat. Contemporary Examples The pundits largely panned President Obama’s first Oval Office address, devoted to amping up his response to the BP oil disaster. The GOP’s BP Problem Richard Wolffe June 16, 2010 […]