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’
    • ‘A eutectic mixture has a melting point below room temperature; therefore, both local anesthetics exist as a liquid oil rather than as crystals.’
    • ‘When the temperature has been lowered sufficiently, the remaining liquid solidifies as a eutectic structure of austenite and graphite.’
    • ‘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.’
    • ‘The large volume fraction of primary and/or eutectic carbides in their microstructures provides the high hardness needed for crushing and grinding other materials.’


  • 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 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.’
    • ‘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 copper exceeds 5%, commercial heat treatment cannot dissolve it and the network of eutectics does not break up.’
    1. 1.1
      short for eutectic point


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