[R. SWIM v. Cf. G. schwimmblase.] A fish’s swimming-bladder (see SWIMMING vbl. sb. 6).
1837. P. Keith, Bot. Lex., 375. Ascending or descending chiefly by means of the compression or dilatation of the swim-bladder, an organ with which most fishes are furnished.
1883. Knowledge, 30 March, 191/1. Isinglass … is … the swim-bladder of the sturgeon and similar fishes cut into shreds.
1896. trans. Boas’ Text Bk. Zool., 344. In most Fish … the lung … simply possesses the power of diminishing the specific gravity of the animal, and is termed the swim-bladder.
