[ yoo-tek-tik ]
/ yuˈtɛk tɪk /
Physical Chemistry
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of greatest fusibility: said of an alloy or mixture whose melting point is lower than that of any other alloy or mixture of the same ingredients.
noting or pertaining to such a mixture or its properties: a eutectic melting point.


a eutectic substance.



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Origin of eutectic

1880–85; <Greek eútēkt(os) easily melted, dissolved (eu-eu- + tēktós melted) + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for eutectic

British Dictionary definitions for eutectic

/ (juːˈtɛktɪk) /


(of a mixture of substances, esp an alloy) having the lowest freezing point of all possible mixtures of the substances
concerned with or suitable for the formation of eutectic mixtures


a eutectic mixture
the temperature on a phase diagram at which a eutectic mixture forms

Word Origin for eutectic

C19: from Greek eutēktos melting readily, from eu- + tēkein to melt
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

Scientific definitions for eutectic

[ yōō-tĕktĭk ]

The proportion of constituents in an alloy or other mixture that yields the lowest possible complete melting point. In all other proportions, the mixture will not have a uniform melting point; some of the mixture will remain solid and some liquid. At the eutectic, the solidus and liquidus temperatures are the same.
An alloy or other mixture with constituents in the proportions of the eutectic.
The melting point of the eutectic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.