Definition of eutectic in English:



  • Relating to or denoting a mixture of substances (in fixed proportions) that melts and freezes at a single temperature that is lower than the melting points of the separate constituents or of any other mixture of them.

    ‘the eutectic mixture melts at 183°C’
    ‘silver and copper form a eutectic system’
    • ‘The large volume fraction of primary and/or eutectic carbides in their microstructures provides the high hardness needed for crushing and grinding other materials.’
    • ‘A eutectic mixture has a melting point below room temperature; therefore, both local anesthetics exist as a liquid oil rather than as crystals.’
    • ‘All children were given a patch of eutectic mixture of local anesthetic, because midazolam does not have analgesic properties, and later were given the nasal spray.’
    • ‘Therefore, in exceptional cases, alloys with less than 2% C can solidify with a eutectic structure and therefore still belong to the family of cast iron.’
    • ‘When the temperature has been lowered sufficiently, the remaining liquid solidifies as a eutectic structure of austenite and graphite.’


  • 1A eutectic mixture.

    • ‘The structure is illustrated in Fig.4 from the Cast Iron article which shows the structure of the phosphide eutectic, together with graphite, ferrite and pearlite.’
    • ‘When the copper exceeds 5%, commercial heat treatment cannot dissolve it and the network of eutectics does not break up.’
    • ‘All the phases formed tend to concentrate at the grain boundaries, in the form of complex eutectics, more or less coupled.’
    • ‘Modification of the hypoeutectic alloys is particularly advantageous in sand castings, and can be effectively achieved through the addition of a controlled amount of sodium or strontium, which refines the silicon eutectic.’
    • ‘When the metastable path is followed, the rich carbon phase in the eutectic is the iron carbide; when the stable solidification path is followed, the rich carbon phase is graphite.’
    1. 1.1
      short for eutectic point


Late 19th century: from Greek eutēktos ‘easily melting’, from eu ‘well, easily’ + tēkein ‘melt’.