from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See sounding line.
from the GNU version of the Collaborative International Dictionary of English
- n. A sounding line.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (nautical) plumb line for determining depth
From the use of lead weights for making soundings.(American Heritage® Dictionary of the English Language, Fourth Edition)