verb (used with object)

  1. to cool less than necessary for a given process or purpose.
  2. to supercool.
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.

Origin of undercool

First recorded in 1900–05; under- + cool
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for undercool



a less common word for supercool
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