lead-line

lead line

[led]
noun Nautical.
a line by which a lead is lowered into the water to take soundings: in deep-sea practice, divided into levels one fathom apart, variously treated as marks and deeps.

Origin:
1475–85

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Collins
World English Dictionary
lead line (lɛd)
 
n
nautical a length of line for swinging a lead, marked at various points to indicate multiples of fathoms

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

lead line n.
An irregular dark deposit in the gums occurring in lead poisoning.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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