subscript

A distinguishing character or symbol written directly beneath or next to and slightly below a letter or number.

Written beneath.

Written beneath: as, the Greek iota (ι) subscript, so written since the twelfth century in the improper diphthongs ᾳ (α%26ι), ῃ (ηι), ῳ (ωι): opposed to adscript (as in Ἀι, Ἠι, Ὠι). This ι had become mute by about 200 b. c., and was sometimes written (adscript), sometimes omitted.

Something written beneath.

Written below or underneath. (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. See suffix, n., 2, and subindex.

Anything written below.

A type of lettering form written lower than the things around it.

A numerical index into an array.

a character or symbol set or printed or written beneath or slightly below and to the side of another character

written or printed below and to one side of another character