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pyrognostics

[pahy-ruh g-nos-tiks]
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plural noun
  1. those properties of a mineral that it exhibits when heated, alone or with fluxes, in the blowpipe flame, as the fusibility, intumescence, or other phenomena of fusion, flame coloration, etc.
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Origin of pyrognostics

First recorded in 1840–50; pyro- + gnost(ic) + -ics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pyrognostics

pyrognostics

pl n
  1. the characteristics of a mineral, such as fusibility and flame coloration, that are revealed by the application of heat
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Word Origin

C19: from pyro- + -gnostics, from Greek gnōsis knowledge
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