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In medicine, an indication is a valid reason to use a certain test, medication, procedure, or surgery.[1] The opposite of an indication is a contraindication,[2] a reason to withhold a certain medical treatment because it could harm a patient.
Medical Definition of SYMBOL. : something that stands for or suggests something else: as a: an arbitrary or conventional sign used in writing or printing relating to a particular field to represent operations, quantities, elements, relations, or qualities. â symÂ·bolÂ·ic \sim-Ëbael-ËbÃ¤l\ ik. adjectiveedical Definition of SYMBOL. : something that stands for or suggests something else: as a: an arbitrary or conventional sign used in writing or printing relating to a particular field to represent operations, quantities, elements, relations, or qualities. â symÂ·bolÂ·ic \sim-Ëbael-ËbÃ¤l\ ik. adjective