General term for a character or symbol written smaller and slightly above or below the baseline, as in chemical formulas or mathematical notation.
The '₂' in H₂O is a subscript.
In mathematics, a subscript or superscript used to label elements of a sequence, vector, or tensor; often read as a number or letter attached to a variable.
The 2 at the upper right of x is a superscript.
The subscripts in the sequence a₁, a₂, a₃ indicate the term numbers.
subscripting
subscript
subscript triplet
vector subscript
section subscript
subscripted data-name
Standard spelling; the okurigana makes the reading clear.
Abbreviated kanji spelling, common in technical contexts.
Compound of 添え (soe, 'attached') + 字 (ji, 'character'). The kanji 添 means 'to attach' or 'to add'.