Meaning of SHIP'S BELL

WordNet Dictionary
	Definition:		[n]  (nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.
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	Synonyms:		bell
	See Also:		time unit, unit of time