+poroma.+ Callus; exostosis. +potassium.+ An alkaline metallic element. Among the salts of potassium are: potassium bichromate, employed externally as a caustic to syphilitic vegetations; potassium hydroxide, used as a strong penetrating caustic. +poultice.+ A soft emulsion for external application. +pous.+ Foot, as in podiatrist. +pre.+ A prefix denoting anterior or before. +predisposing.+ Inclining to, as a disease. +prepatellar.+ In front of the patella. +prognosis.+ A forecast of the result. In medicine, the prior determination of the outcome of a disease. +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. +punctured.+ Wounded by a pointed instrument. +purge.+ A cathartic. +purulent.+ Having the character of pus. +pus.+ A fluid product of inflammation. +pustule.+ A soft purulent papule. +putrefaction.+ Organic decomposition, decay. +putrid.+ Manifesting putrefaction. +pyemia.+ A condition in which pyogenic bacteria circulate in the blood, and form abscesses wherever they lodge. +pyogenic.+ Developing or excreting pus. +pyorrhea.+ A discharge of pus. +pyorrhea alveolaris.+ Rigg’s disease; suppurative inflammation of the periosteum lining the teeth in their sockets. +Q+ +q.h.+ Every hour, used in prescription writing. +q.s.+ Sufficient quantity, used in prescription writing. +quinine.+ An alkaloid of cinchona. +quinine and urea hydrochlorate.+ Used as a local anesthetic. +R+ +rachitic.+ Pertaining to rickets. +rationale.+ Fundamental reason. +Raynaud’s disease.+ Symmetrical gangrene of the extremities. +recipe.+ “Take thou.” Used to precede directions in prescription writing. +rectum.+ The terminal part of the digestive tube from the pelvic colon to the anus. +refrigeration.+ The act of cooling or reducing fever. +remittent.+ Characterized by temporary abatement of symptoms. +resection.+ Removal of articular ends forming a joint; removing a segment of any part. +retention.+ Holding back as of excretions and secretions. +rhea.+ A flow, as in diarrhea, an abnormally frequent discharge of more or less fluid fecal matter from the bowels. +rheumatism.+ An acute, probably infectious, condition; when articular, the joints are inflamed. +rhigolene.+ A liquid obtained from petroleum distillation. Used as a local anesthetic.