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a chemical element, atomic number 49, atomic weight 114.82. (See Appendix 6.)
indium 111 an artificial isotope of indium, having a half-life of 2.81 days and emitting gamma rays; it is used as a radioactive tracer in nuclear medicine.
INIntraepithelial neoplasia, see these.
1. Symbol for indium
2. Abbreviation for inulin