Dictionary.com
definitions

autocatalysis

[aw-toh-kuh-tal-uh-sis]
noun, plural au·to·ca·tal·y·ses [aw-toh-kuh-tal-uh-seez] /ˌɔ toʊ kəˈtæl əˌsiz/. Chemistry, Biochemistry.
  1. catalysis caused by a catalytic agent formed during a reaction.

Origin of autocatalysis

First recorded in 1890–95; auto-1 + catalysis
Related formsau·to·cat·a·lyt·ic [aw-toh-kat-l-it-ik] /ˌɔ toʊˌkæt lˈɪt ɪk/, adjectiveau·to·cat·a·lyt·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for autocatalytic

autocatalysis

noun plural -ses (-ˌsiːz)
  1. the catalysis of a reaction in which the catalyst is one of the products of the reaction
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
autocatalytic in Medicine

autocatalysis

[ô′tō-kə-tăl′ĭ-sĭs]
n.
  1. Catalysis of a chemical reaction by one of the products of the reaction.
Related formsau′to•cat′a•lyt′ic (-kăt′l-ĭt′ĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.