| petrel | (noun) relatively small long-winged tube-nosed bird that flies far from land | - |
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| petrifaction | (noun) a rock created by petrifaction; an organic object infiltrated with mineral matter and preserved in its original form | - |
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| (noun) the process of turning some plant material into stone by infiltration with water carrying mineral particles without changing the original shape | Synonyms: petrification |
| petrification | (noun) the process of turning some plant material into stone by infiltration with water carrying mineral particles without changing the original shape | Synonyms: petrifaction |
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| petrify | (verb) change into stone | Synonyms: lapidify |
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| (verb) cause to become stonelike or stiff or dazed and stunned from fright | - |
| (verb) make rigid and set into a conventional pattern | Synonyms: ossify, rigidify |
| petrifying | (adjective) paralyzing with terror | - |
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| petrissage | (noun) massage of the skin which is gently lifted and squeezed | - |
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| petrochemical | (noun) any compound obtained from petroleum or natural gas | - |
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| petroglyph | (noun) a carving or line drawing on rock (especially one made by prehistoric people) | - |
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| petrol | (noun) a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines | Synonyms: gas, gasolene, gasoline |
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| petrolatum | (noun) a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication | Synonyms: mineral jelly, petroleum jelly |
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| petroleum | (noun) a dark oil consisting mainly of hydrocarbons | Synonyms: crude, crude oil, fossil oil, oil, rock oil |
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| petrology | (noun) the branch of geology that studies rocks: their origin and formation and mineral composition and classification | Synonyms: lithology |
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| petrous | (adjective) (of bone especially the temporal bone) resembling stone in hardness | Synonyms: stonelike |
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