Meaning of SUBSCRIPT in English

noun anything written below.

2. subscript ·adj written below or underneath; as, iota subscript. (·see under iota.) specifically (math.), said of marks, figures, or letters (suffixes), written below and usually to the right of other letters to distinguish them; as, a, n, 2, in the symbols xa, an, y2. ·see suffix, ·noun, 2, and subindex.

Webster English vocab.      Английский словарь Webster.