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prosthesis the replacement of a defective or missing bodily limb or other part with an artificial substitute. [2 definitions]
prosthetics the surgical or dental speciality that deals with the design, production, fitting, and use of artificial organs and body parts. [2 definitions]
prostitute one who earns money by engaging in sexual relations with others for a fee. [4 definitions]
prostitution the act or practice of selling oneself for sexual purposes. [2 definitions]
prostrate to lie or throw (oneself) flat on the ground, esp. face down in an act of humility, worship, or the like. [6 definitions]
prostration severe physical or emotional exhaustion. [2 definitions]
prostyle having a portico with columns in the front only, as a classical Greek temple. [2 definitions]
prosy uninteresting or commonplace; matter-of-fact; prosaic.
Prot. abbreviation of "Protestant," any Christian, esp. in the West, who belongs to a non-Catholic church. [2 definitions]
protactinium a very toxic radioactive chemical element of the actinide series that has ninety-one protons in each nucleus and that is a product of the radioactive decay of uranium. (symbol: Pa)
protagonist the leading character in a literary work.
protasis in a conditional sentence, the clause that expresses the condition, usu. beginning with "if". (Cf. apodosis.)
protean easily changing form or character; variable or versatile. [2 definitions]
protease any enzyme that stimulates the digestion of protein.
protect to ensure the safety of; shield from danger or harm. [3 definitions]
protectable combined form of protect.
protecting providing security; shielding from danger or harm.
protection the act of protecting or condition of being protected. [4 definitions]
protectionism the theory and practice of imposing high tariffs on imported goods to protect native industries from competition.
protective providing or intending to provide protection.
protector a person who guards against harm or danger; guardian. [2 definitions]