Function: noun
Date: 1922
1 : a curve plotting performance against practice especially : one graphing decline in unit costs with cumulative output
2 : the course of progress made in learning something
Function: noun
Date: 1922
1 : a curve plotting performance against practice especially : one graphing decline in unit costs with cumulative output
2 : the course of progress made in learning something
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012