catalysed rate of reaction,
The observed
rate of reaction
,
,
minus the spontaneous
rate of reaction
,
,
observed under otherwise similar conditions in the absence of added catalytic material.
Source:
PAC, 1979,
51
, 2451
(Quantities and units in clinical chemistry)
on page 2464
, minus the spontaneous rate of reaction, 
, observed under otherwise similar conditions in the absence of added catalytic material.