1. (n.) An oblong shield made of boards or wickerwork covered with leather, with sometimes an iron rim; -- carried chiefly by the heavy-armed infantry.
2. (n.) A penthouse or awning.
3. (n.) The second and largest of the four parts forming the upper surface of a thoracic segment of an insect. It is preceded by the prescutum and followed by the scutellum.
4. (n.) One of the two lower valves of the operculum of a barnacle.