Function: noun
Date: circa 1864
: a surface composed at any instant of all the points just reached by a vibrational disturbance in its propagation through a medium
Function: noun
Date: circa 1864
: a surface composed at any instant of all the points just reached by a vibrational disturbance in its propagation through a medium
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012