a North American gull, Larus delawarensis, having a black ring around the bill.
noun 1. a loose-leaf binder in which the sheets are held in by two or more rings that can be made to snap open. noun 1. a loose-leaf binder fitted with metal rings that can be opened to allow perforated paper to be inserted
noun 1. a bolt with a ring fitted in an eye at its head. noun 1. a bolt with a ring fitted through an eye attached to the bolt head
noun, Veterinary Pathology. 1. a morbid bony growth on the pastern bones of a horse, often resulting in lameness. noun 1. an abnormal bony growth affecting the pastern of a horse, often causing lameness
noun 1. a ring-shaped life preserver.