/ Dictionary / Index P propylite: Meaning and Definition of Find definitions for: prop•y•lite Pronunciation: (prop'u-līt"), [key] — n. Petrog. a hydrothermally altered andesite or allied rock containing secondary minerals, as calcite, chlorite, serpentine, or epidote. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propylic propylon Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language