Wrack

(răk), n. [Fr. varec, varech, Pr. varec. Cf. Ar. warak, a leaf of a tree.] A marine plant (Zostera marina), out of which kelp is made, and which is also of great utility as a manure;—sometimes called sea-wrack or sea-wreck, sea-oak, and sea-tangle. It is found on rocks left dry at low water. The stalk runs along the middle of the leaf, and is terminated by watery bladders.

(răk), v. t. 1. To wreck. [Obs.] Milton. 2. To rack. [Rare.] Cowley.