a line marked off to indicate its length and having a sounding lead at one end. It is dropped over the side of a vessel to determine the depth of the water
WordReference Random House Unabridged Dictionary of American English © 2025
sound′ing line′,
- Nautical, Naval Termsa line weighted with a lead or plummet (sounding lead)and bearing marks to show the length paid out, used for sounding, as at sea.
- Middle English 1300–50
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'sounding line' also found in these entries (note: many are not synonyms or translations):