ac·e·tate (?s??-t?t?)n.1. A salt or ester of acetic acid.2. Cellulose acetate or any of various products, especially fibers, derived from it.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.acetate (?æs??te?t) n1. (Elements & Compounds) any salt or ester of acetic acid, containing the monovalent ion CH3COO? or the group CH3COO-. Systematic name: ethanoate 2. (Elements & Compounds) (modifier) consisting of, containing, or concerned with the group CH3COO-: acetate group or radical. 3. (Elements & Compounds) short for acetate rayon, cellulose acetate4. (Textiles) short for acetate rayon, cellulose acetate5. (Electronics) a sound recording disc composed of an acetate lacquer coating on an aluminium or plastic base: used for demonstration or other short-term purposes[C19: from acetic + -ate1] ?ace?tated adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014ac?e?tate (?æs ??te?t) n. 1. a salt or ester of acetic acid. 2. a synthetic filament, yarn, or material derived from the acetic ester of cellulose. 3. cellulose acetate. [1820?30] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.ac·e·tate (?s??-t?t?)1. A salt or ester of acetic acid.2. Cellulose acetate or a product made from it, especially fibers or film. See more at cellulose.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.