Physics. a temperature at which a substance undergoes some abrupt change in its properties, as when it passes from the normal to the superconducting state.
Also called transition point.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the temperature at which a sudden change of physical properties occurs, such as a change of phase or crystalline structure, or at which a substance becomes superconducting
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