knot (kn)A unit of speed used at sea, defined as one nautical mile per hour. The international knot (1852 m/h) used in the US differs slightly from the UK knot (6080 ft/h). The name comes from the old practice of measuring speed at sea by counting the number of knots in a knotted line payed out over the stern in a given time. Related category UNITSAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |