IN MATH: 1. n. the superscript at the beginning of a radical sign indicating the root to be taken, or extracted.
Take some time to experiment. This page permits one to examine different indices.

IN ENGLISH: 1. a listing of names, numbers, ets. EX. a telephone book. 2. an indicator. EX. The Consumer Price Index is often useful. 3. as defined above.
APPLICATION: (see list 270).
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