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The Collaborative International Dictionary
Contline

Contline \Cont"line`\, n.

  1. (Ropemaking) The space between the strands on the outside of a rope.
    --Knight.

  2. (Naut.) The space between the bilges of two casks stowed side by side.

Wiktionary
contline

n. 1 (context nautical English) The spiral groove between the strands of a rope 2 (context nautical English) The space between casks stowed side by side