A term describing the
reaction rate of a
chemical reaction in which the rate is proportional to the concentration (in
moles) of only one of the reactants. Such a reaction might have an
equation like "rate = k[A]," where k is the reaction rate constant and [A] is the concentration of a reactant A.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.