Function: noun plural but singular or plural in construction
Date: 1985
: aerobics that involves repeatedly stepping on and off a raised platform ― called also step training
Function: noun plural but singular or plural in construction
Date: 1985
: aerobics that involves repeatedly stepping on and off a raised platform ― called also step training
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012