1876
: a value that results from dividing the change in a function of a variable by the change in the variable <velocity is the rate of change in distance with respect to time>
1876
: a value that results from dividing the change in a function of a variable by the change in the variable <velocity is the rate of change in distance with respect to time>
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012