EXPANSION-VALVE
\ɛkspˈanʃənvˈalv], \ɛkspˈanʃənvˈalv], \ɛ_k_s_p_ˈa_n_ʃ_ə_n_v_ˈa_l_v]\
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In a steam-engine, a valve which shuts off the steam in its passage to the slide-valves, when the piston has travelled a certain distance in the cylinder, leaving the remaining part of the stroke to be performed by the expansion of the steam.
By Daniel Lyons
Word of the day
Snake's-head
- Guinea-hen flower; -- so called in England because its spotted petals resemble the scales of a snake's head.