(definition) by Webster 1913 Wed Dec 22 1999 at 3:32:20

Sub*in"dex (?), n.; pl. Subindices (). Math.

A number or mark placed opposite the lower part of a letter or symbol to distinguish the symbol; thus, a0, b1, c2, xn, have 0, 1, 2, and n as subindices.

 

© Webster 1913.

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