·noun Anything written below.
II. 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.