STOP n.
or in the material which is supplied to it, etc. -- Stop plank, one of a set of planks employed to form a sort of dam in some hydraulic works. -- Stop valve, a valve that can be closed or opened at will, as by hand, for preventing or regulating flow, as of a liquid in a pipe; -- in distinction from a valve which is o…
SULPHUR n.
ess gas, SO2, of a pungent, suffocating odor, produced by the burning of sulphur. It is employed chiefly in the production of sulphuric acid, and as a reagent in bleaching; -- called also sulphurous anhydride, and formerly sulphurous acid. -- Sulphur ether (Chem.), a sulphide of hydrocarbon radicals, formed like the o…
SUNDAY n.
The first day of the week, -- consecrated among Christians to rest from secular employments, and to religious worship; the Christian Sabbath; the Lord's Day. Advent Sunday, Low Sunday, Passion Sunday, etc. See under Advent, Low, etc.