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Latin petra (rock, stone), from Ancient Greek.



petrescent (not comparable)

  1. Petrifying; converting into stone.
    • 1672, Robert Boyle, Origin and Virtues of Gems:
      in the solid substance of the stone; [] this compact and ponderous body was made stony, by the supervention of some petrescent liquor upon porous earth

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “petrescent”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)