Noun
The sum or number to be subtracted, or taken from another.
Source: Webster's dictionarySince there was no subtraction instruction, only the twos-complement add (TAD), computing the difference of two operands required first negating the subtrahend. Source: Internet
In 1678, the publication of Caspar Questel's De pulvinari morientibus non subtrahend, ("On the pillow of which the dying should not be deprived"), initiated debate on the topic. Source: Internet
Subtraction finds the difference between two numbers, the minuend minus the subtrahend. Source: Internet