lubber's line

or lubber line

  1. a vertical line on the forward inner side of the bowl of a fixed compass, used as a reference mark indicating the heading of a vessel.

Origin of lubber's line

First recorded in 1855–65
  • Also called lubber's mark, lubber's point .

Words Nearby lubber's line Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023