2. Fig.: Obduracy; callousness. Hallywell.

(Pet"ri*fy) v. t. [imp. & p. p. Petrified ; p. pr. & vb. n. Petrifying ] [L. petra rock, Gr. (akin to a stone) + -fy: cf. F. pétrifier. Cf. Parrot, Petrel, Pier.]

1. To convert, as any animal or vegetable matter, into stone or stony substance.

A river that petrifies any sort of wood or leaves.

2. To make callous or obdurate; to stupefy; to paralyze; to transform; as by petrifaction; as, to petrify the heart. Young. "Petrifying accuracy." Sir W. Scott.

And petrify a genius to a dunce.

The poor, petrified journeyman, quite unconscious of what he was doing.
De Quincey.

A hideous fatalism, which ought, logically, to petrify your volition.
G. Eliot.

(Pet"ri*fy), v. i.

1. To become stone, or of a stony hardness, as organic matter by calcareous deposits.

2. Fig.: To become stony, callous, or obdurate.

Like Niobe we marble grow,
And petrify with grief.

(Pe"trine) a. Of or pertaining to St.Peter; as, the Petrine Epistles.

(Pet"ro-) A combining form from Gr. a rock, a stone; as, petrology, petroglyphic.

(Pe*trog"a*le) n. [NL., fr. Gr. a rock + a weasel.] (Zoöl.) Any Australian kangaroo of the genus Petrogale, as the rock wallaby (P. penicillata).

(Pet`ro*glyph"ic) a. Of or pertaining to petroglyphy.

(Pe*trog"ly*phy) n. [Petro + Gr. to carve.] The art or operation of carving figures or inscriptions on rock or stone.

(Pet`ro*graph"ic Pet`ro*graph"ic*al) a. Pertaining to petrography.

(Pe*trog"ra*phy) n. [Petro + -graphy.]

1. The art of writing on stone.

2. The scientific description of rocks; that department of science which investigates the constitution of rocks; petrology.

(Pet`ro*hy"oid) a. [Petro + hyoid.] (Anat.) Pertaining to petrous, oe periotic, portion of the skull and the hyoid arch; as, the petrohyoid muscles of the frog.

(Pe*trol") n. Petroleum. [R.]

(Pet`ro*la"tum) n. (Chem. & Pharm.) A semisolid unctuous substance, neutral, and without taste or odor, derived from petroleum by distilling off the lighter portions and purifying the residue. It is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent. It is used as a bland protective dressing, and as a substitute for fatty materials in ointments. U. S. Pharm.

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