Function: noun
Date: 1802
: a valve that opens and closes a passageway by sliding over a port specifically : such a valve often used in steam engines for admitting steam to the piston and releasing it
Function: noun
Date: 1802
: a valve that opens and closes a passageway by sliding over a port specifically : such a valve often used in steam engines for admitting steam to the piston and releasing it
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012