subscript
nounUK /ˈsʌb.skrɪpt/
US /ˈsʌb.skrɪpt/
A small letter or number written below and to the side of another letter or number.
In the formula H₂O, the 2 is a subscript.
RELATED WORDS
OTHER MEANINGS
2. A symbol or character written below the baseline of normal text.
The chemical equation uses subscripts to show how many atoms there are.
3. In computing, a way to access an element of an array using an index.
The program uses a subscript to find the third item in the list.
4. Written or printed below something else.
The subscript text appeared smaller than the main line.