n. 1. (Zool.) A bird having a distinct band of color across the tail, as the hen harrier. [ 1913 Webster ]
2. (Naut.) A light sail set abaft and beyong the leech of a boom-and-gaff sail; -- called also ringsail. [ 1913 Webster ]
Ringtail boom (Naut.), a spar which is rigged on a boom for setting a ringtail. [ 1913 Webster ]