fishing line

from The Century Dictionary.

• noun A line used with hooks and bait in catching fish; a fish-line.
• noun In zoology, one of sundry simple elongated or extensile tentacular parts of some compound organisms, as the Siphonophora, provided with special urticating organs, thread-cells, or nematocysts. Gegenbaur. Also grappling-line.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A cord or line where the hook or lure is attached.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a length of cord to which the leader and float and sinker and hook are attached