[ih-pok-see, ih-pok-]Chemistry
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noun, plural ep·ox·ies.
  1. Also called epoxy resin. any of a class of resins derived by polymerization from epoxides: used chiefly in adhesives, coatings, electrical insulation, solder mix, and castings.
verb (used with object), ep·ox·ied, ep·ox·y·ing.
  1. to bond (two materials) by means of an epoxy resin.

Origin of epoxy

First recorded in 1915–20; ep- + oxy-2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for epoxy

Historical Examples of epoxy

British Dictionary definitions for epoxy


adjective chem
  1. of, consisting of, or containing an oxygen atom joined to two different groups that are themselves joined to other groupsepoxy group
  2. of, relating to, or consisting of an epoxy resin
noun plural epoxies
  1. short for epoxy resin

Word Origin for epoxy

C20: from epi- + oxy- ²
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

Word Origin and History for epoxy

1916, in reference to certain chemical compounds, from epi- + first element of oxygen (epoxy- is used as a prefix in chemistry). Resins from them are used as powerful glues. Hence the verb meaning "to bond with epoxy" (1965). Related: Epoxied.

Online Etymology Dictionary, © 2010 Douglas Harper

epoxy in Medicine


  1. Any of various usually thermosetting resins capable of forming tight cross-linked polymer structures characterized by toughness, strong adhesion, and low shrinkage, used especially in surface coatings and adhesives.
  1. Containing an oxygen atom bound to two different atoms linked in some other way, especially a compound containing a ring formed by one oxygen atom and two carbon atoms.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

epoxy in Science


  1. Any of various artificial resins made of chains of epoxide rings. Epoxies are tough, very adhesive, and resistant to chemicals. They are used to make protective coatings and glues. Also called epoxy resin
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

epoxy in Culture



A high-strength adhesive, often made of two different materials that must be mixed together just prior to use.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.