proliferation. Cell-genesis, reproduction.
pronation. The act of rotating the forearm in such a way that the palm of the hand looks backward when the arm is in the anatomic position, or downward when the arm is extended at a right angle with the body. (Stedman.)
prophylactic. Preventing disease.
protargol. A combination of silver with a proteid base.
protean. Having the power to change form.
protonuclein. A preparation from the lymphoid tissue of animals.
protoplasm. Primitive organic cell matter.
protuberance. A projecting part.
pseudo. Prefix, signifying false.
ptomain. A crystallizable nitrogenous basic substance, produced by bacteria in dead animal or vegetable matter.