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undercool

[uhn-der-kool]
verb (used with object)
  1. Chemistry.
    1. to cool less than necessary for a given process or purpose.
    2. to supercool.
  2. Metallurgy. to cool (molten metal) without forming crystals to a temperature below that at which crystallization normally takes place: Metal must be absolutely still to be undercooled.
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Origin of undercool

First recorded in 1900–05; under- + cool
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for undercooling

undercool

verb
  1. a less common word for supercool
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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