Sub"script (?), a. [L. subscriptus, p.p. See Subscribe.]
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, n., 2, and Subindex.
© Webster 1913.
Sub"script, n.
Anything written below.
Bentley.
© Webster 1913.