noun air defense by the use aircraft or missiles or artillery or electronic countermeasures
noun an application that is currently running and in the foreground
noun childbirth during which the mother is encouraged to be an active participant
Active capital, Active wealth
money, or property that may readily be converted into money.
noun a citizen who takes an active role in the community (as in crime prevention and neighborhood watch)
noun a form of acquired immunity in which the body produces its own antibodies against disease-causing antigens
active matrix screen
noun a type of LCD screen used for some portable computers; there is a separate circuit for each pixel
noun a placebo used in experimental tests of a drug that has noticeable side effects
an active placebo mimics the side effects of the experimental drug
noun the part of an enzyme or antibody where the chemical reaction occurs
noun transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
noun a trust in which the trustee must perform certain duties
noun the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb
`The boy threw the ball' uses the active voice
verb be in a state of action
she is always moving
highly active antiretroviral therapy
noun a combination of protease inhibitors taken with reverse transcriptase inhibitors; used in treating AIDS and HIV
HAART; drug cocktail.
Optically active, Optically inactive
(Chem. Physics), terms used of certain metameric substances which, while identical with each other in other respects, differ in this, viz., that they do or do not produce right-handed or left-handed circular polarization of light.
Acting of one's self or of itself; acting without depending on other agents.
adjective satellite capable of lowering the surface tension of a liquid; used especially of detergents
noun a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved
surfactant; wetter; wetting agent.