n. (Zool.) The thrasher, or fox shark. See Thrasher. [ 1913 Webster ]
n. [ So named in allusion to its swinging. See Swingle, v. i., and cf. Swingtree. ] A whiffletree, or whippletree. See Singletree. [ 1913 Webster ]
n. 1. A little wing; a very small wing. [ 1913 Webster ]
2. (Zool.) A bastard wing, or alula. [ 1913 Webster ]