Of, pertaining to, or characterized by catalysis; having the power of decomposing a compound body apparently by mere contact; resulting from catalysis.A term applied to evolutionary stages or conditions in which organisms are degenerating toward sterility, as a result either of too wide cross-breeding or of too narrow inbreeding. Aberrant or mutative hybrids and abrupt mutative variations or sports appear in the catalytic stages. Compare dialytic, 4, *hemilytic, and *prostholytic.n. Same as catalytic agent.