A state in which if intermediates are formed in significant amounts during the course
of a reaction, the overall stoichiometric
equation does not apply throughout.
PAC, 1981, 53, 753
(Symbolism and terminology in chemical kinetics (Provisional))
on page 754
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook