(chemistry) A very absorbent form of finely powdered carbon; used in purifying gases, and as an antidote for many poisons.

(chemistry) A transitional structure, in an energetically excited state, that forms between the reactants of a chemical reaction and breaks down to form the products

That responds to spoken commands.

plural of activated complex

plural of activated sludge

(grammar, uncountable) the form in which the subject of a verb carries out some action / (grammar, countable) a form in a particular language used to express the active voice

(astronomy) A galaxy where a significant fraction of the energy output is not emitted by the normal components of a galaxy.

(physics) a property caused by asymmetrical molecular or crystal structure that enables a compound or crystal to rotate the plane of incident polarized light

(chemistry, of a crystal or compound) Exhibiting optical activity.

capable of lowering the surface tension of a liquid