Definition of selfâinterest for English Language Learners. : 1  concern only for getting what you want or need and not about what happens to other people. : 2  your own interest or advantage.
RBI is a member of the Reed Elsevier Group plc (NYSE:RUK) (NYSE:ENL) -- a world-leading publisher and information provider operating in the science and medical, legal, education and business-to-business industry sectors. Tommy Landson went 3 for 4 with RBI and Chris Jensen drove in two runs for UCLA (13-34, 2-15).
ruÂ·bidÂ·iÂ·um. Symbol Rb A soft, silvery-white element that is an alkali metal. It ignites spontaneously in air and reacts violently with water. Rubidium is used in photoelectric cells and in making vacuum tubes.Atomic number 37.ubidium. n. 1. (Elements & Compounds) a soft highly reactive radioactive element of the alkali metal group; the 16th most abundant element in the earth's crust (310 parts per million), occurring principally in pollucite, carnallite, and lepidolite. It is used in electronic valves, photocells, and special glass.