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[yoo-tek-tik] /yuˈtɛk tɪk/ Physical Chemistry
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.
1880-85; < Greek eútēkt(os) easily melted, dissolved (eu- eu- + tēktós melted) + -ic Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for eutectic
  • Also, the morphology and the size of the eutectic silicon phase were altered.
British Dictionary definitions for eutectic


(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
C19: from Greek eutēktos melting readily, from eu- + tēkein to melt
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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eutectic in Science

  1. 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.

  2. An alloy or other mixture with constituents in the proportions of the eutectic.

  3. The melting point of the eutectic.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for eutectic

the one mixture of a set of substances able to dissolve in one another as liquids that, of all such mixtures, liquefies at the lowest temperature. If an arbitrarily chosen liquid mixture of such substances is cooled, a temperature will be reached at which one component will begin to separate in its solid form and will continue to do so as the temperature is further decreased. As this component separates, the remaining liquid continuously becomes richer in the other component, until, eventually, the composition of the liquid reaches a value at which both substances begin to separate simultaneously as an intimate mixture of solids. This composition is the eutectic composition and the temperature at which it solidifies is the eutectic temperature; if the original liquid had the eutectic composition, no solid would separate until the eutectic temperature was reached; then both solids would separate in the same ratio as that in the liquid, while the composition of the remaining liquid, that of the deposited solid, and the temperature all remained unchanged throughout the solidification.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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