n. Delay; obstacle; hindrance.n. The sucking-fish, Echeneis remora, or any fish of the family Echeneididæ, having on the top of the head a flattened oval adhesive surface by means of which it can attach itself firmly to various objects, as another fish, a ship's bottom, etc., but whether for protection or conveyance, or both, has not been satisfactorily ascertained. It was formerly believed to have the power of delaying or stopping ships. See cuts under Echeneis and Rhombochirus.n. A genus of such fishes, based on the species above-named.n. In medicine, a stoppage or stagnation, as of the blood.n. In surgery, an instrument to retain parts in place: not now in use.n. In heraldry, a serpent: rare, confined to certain modern blazons.