trip line

noun
1.
(in lumbering) a line for freeing a dog hook from a log at a distance.

Origin:
1900–05

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To trip line
Example sentences
Two techniques, trip line and tracking, are used to record traffic data.
Trip line techniques monitor specific zones on the roadway to detect the presence of a vehicle.
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