SLIDE-VALVE
\slˈa͡ɪdvˈalv], \slˈaɪdvˈalv], \s_l_ˈaɪ_d_v_ˈa_l_v]\
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A dish-shaped rectangular piece, with an accurately plane surface, which is caused by the eccentric to slide in the steam-chest of a steam-engine, so as to open and shut alternately the passages or ports by which the steam enters the cylinder.
By Henry Percy Smith
