Bull's-eye

A small circular or oval wooden block without sheaves, having a groove around it and a hole through it, used for connecting rigging.

A small round cloud, with a ruddy center, supposed by sailors to portend a storm.

A small thick disk of glass inserted in a deck, roof, floor, ship's side, etc., to let in light.

A circular or oval opening for air or light.

A lantern, with a thick glass lens on one side for concentrating the light on any object; also, the lens itself.

Aldebaran, a bright star in the eye of Taurus or the Bull.

The center of a target.

A thick knob or protuberance left on glass by the end of the pipe through which it was blown.

A small and thick old-fashioned watch.