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Dictionary Suite
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petri dish a shallow, round, transparent glass or plastic dish with an overlapping cover, used for culturing bacteria and other microorganisms.
petrify to turn (organic matter) into stone. [4 definitions]
petro- rock; stone. [2 definitions]
petrochemical a chemical derivative of petroleum or natural gas, such as gasoline.
petrodollar (usu. pl.) funds accumulated by an oil-exporting country as part of a surplus in its trade balance, esp. when they are then lent to or invested in other countries.
petroglyph a drawing or carving on rock, esp. from prehistoric times.
petrography the scientific description and classification of rocks.
petrol (chiefly British) a volatile, flammable liquid of hydrocarbons, derived from petroleum and used primarily as fuel for internal-combustion engines; gasoline.
petrolatum a colorless or yellowish, translucent, greasy, semisolid petroleum derivative used as a lubricant and in medical ointments; petroleum jelly.
petroleum a thick, flammable mineral oil obtained by drilling beneath the earth's surface and processed into various fuels and lubricants, naphtha, paraffin, and other products.
petroleum jelly petrolatum.
petrology the scientific study and classification of rocks.
petropolitics (used with a sing. or pl. verb) the management or influencing of international relations based on control of the amount of petroleum available on the world market.
petrous of or pertaining to the dense, hard portion of the human temporal bone that contains the internal auditory organs. [2 definitions]
PET scanner a medical diagnostic technology that uses radioactive tracer material to provide visual information about the activities of the brain.
petticoat a woman's underskirt, like a slip or half-slip but usu. fuller and more ornamented with lace, ruffles, or bows.
pettifogger one who quibbles over trifles, esp. an unscrupulous lawyer.
petting zoo a zoo with docile animals which children can touch and feed.
pettish in, or as if in, a pet; petulant; ill-tempered.
petty of little importance, interest, or consequence; trivial. [4 definitions]
petty bourgeois variant of petit bourgeois.