DENOMINATOR, noun 1. He that gives a name. 2. In arithmetic, that number placed below the line in vulgar fractions, which shows into how many parts the integer is divided. Thus in 3/5, 5 is the denominator showing that the integer is divided into five parts; and the numerator 3 shows how many parts are taken, that is, three fifths.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI