larboard, n. [Lar- is of uncertain origin, possibly the same as lower, i. e., humbler in rank, because the starboard side is considered by mariners as higher in rank; cf. D. laag low, akin to E. low. See Board, n., 8.].
The left-hand side of a ship to one on board facing toward the bow; port; -- opposed to starboard. [1913 Webster]
"Larboard is a nearly obsolete term, having been superseded by port to avoid liability of confusion with starboard, owing to similarity of sound."
On or pertaining to the left-hand side of a vessel; port; as, the larboard quarter. [1913 Webster]