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noun, Physics.
any of several rules designating allowed transitions between quantum states in terms of the quantum numbers associated with the states.


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  • Selective

    adjective 1. having the function or power of selecting; making a selection. 2. characterized by selection, especially fastidious selection. 3. of or relating to selection. 4. Electricity, Radio. having good selectivity. adjective 1. of or characterized by selection 2. tending to choose carefully or characterized by careful choice 3. (electronics) occurring at, operating at, or […]

  • Selective attention

    noun 1. (psychol) the process by which a person can selectively pick out one message from a mixture of messages occurring simultaneously

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    noun the intentional mating of two animals in an attempt to produce offspring with desirable characteristics or for the elimination of a trait

  • Selective inhibition

    selective inhibition se·lec·tive inhibition (sĭ-lěk’tĭv) n. See competitive inhibition.

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