SINCE 1828
log line
nounDefinition of log line
: a line that is usually made of cord (as hemp, braided cotton twine) and that is used in gauging the speed of a ship or the velocity of a water current
especially
: such a line that is divided into knots (see knot sense 8a) and that has a log chip attached to one end and that runs out from a log reel
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From the Editors at Merriam-Webster
Is 'Knots an Hour' Wrong?
Is 'Knots an Hour' Wrong?
Some say knots can only be a measure of speed. Are they right?
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