n. (Naut.) One of the planks next the keel on the outside, which form a garboard strake. [ 1913 Webster ]

Garboard strake or
Garboard streak, the first range or strake of planks laid on a ship's bottom next the keel. Totten. [ 1913 Webster ]

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. ] (Naut.) 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☞ Larboard is a nearly obsolete term, having been superseded by port to avoid liability of confusion with starboard, owing to similarity of sound. [ 1913 Webster ]

a. On or pertaining to the left-hand side of a vessel; port; as, the larboard quarter. [ 1913 Webster ]