Leech, n. [Cf. LG. leik, Icel. līk, Sw. lik boltrope, stående liken the leeches.] (Naut.) The border or edge at the side of a sail. [Written also leach.]
Leech line, a line attached to the leech ropes of sails, passing up through blocks on the yards, to haul the leeches by. Totten. — Leech rope, that part of the boltrope to which the side of a sail is sewed.