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noun Petrography.
  1. a hydrothermally altered andesite or allied rock containing secondary minerals, as calcite, chlorite, serpentine, or epidote.

Origin of propylite

First recorded in 1867; propyl + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for propylite

Historical Examples

  • These consisted of rocks moderately rich in silica, and are grouped under the heads of propylite and andesite.

    Volcanoes: Past and Present</p>

    Edward Hull

British Dictionary definitions for propylite


  1. geology an altered andesite or similar rock containing calcite, chlorite, etc, produced by the action of hot water

Word Origin

C20: from propylon (see propylaeum) + -ite 1; so named because it is associated with the start of the Tertiary volcanic era
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

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