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Webster 1913 Edition
Ringtail
Ring′tailˊ
,Noun.
 1. 
(Zool.) 
A bird having a distinct band of color across the tail, as the hen harrier. 
2. 
(Naut.) 
A light sail set abaft and beyong the leech of a boom-and-gaff sail; – called also 
ringsail
. Ringtail boom 
(Naut.)
, a spar which is rigged on a boom for setting a ringtail.
 Definition 2025
ringtail
ringtail
English

Ring-tailed Lemur.
Noun
ringtail (plural ringtail or ringtails)
-  A ring-tailed animal, notably:
- The capuchin monkey
 - A raccoon
 - The cacomistle, a small carnivorous mammal, Bassariscus astutus, somewhat like a raccoon, native to the southwestern United States
 
 - (nautical) A ringsail.