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"small fore and aft rigged vessel with one mast, generally carrying a jib, fore-stay sail, mainsail, and gaff-topsail," 1620s, from Dutch sloep "a sloop;" probably from French chaloupe, from Old French chalupe "small, sloop-rigged vessel," which is perhaps related to English shallop [OED]. But according to Barnhart and Watkins the Dutch word might simply be from Middle Dutch slupen "to glide," from PIE *sleubh- (see sleeve). In old military use, a small ship of war carrying guns on the upper deck only (1670s).
"Parallel Programming in a Virtual Object Space", S. Lucco, SIGPLAN Notices 22(12):26-34 (OOPSLA '87) (Dec 1987).
single-masted sailing vessel with fore-and-aft rigging, including mainsail, jib, and sometimes one or more headsails. A sloop of war was a small sloop-rigged warship, mounting about 20 guns. In modern usage, the sloop is practically synonymous with the cutter