Also contains definition of: enzyme activator
A substance, other than the catalyst
or one of the substrates, that increases the rate of a catalysed reaction without itself being consumed; the process is called activation
. An activator of an enzyme-catalysed reaction may be called enzyme activator, if it acts by binding to the enzyme.
PAC, 1993, 65, 2291
(Nomenclature of kinetic methods of analysis (IUPAC Recommendations 1993))
on page 2292