noun a penthouse or awning.
2. scutum ·noun one of the two lower valves of the operculum of a barnacle.
3. scutum ·noun an oblong shield made of boards or wickerwork covered with leather, with sometimes an iron rim;
carried chiefly by the heavy-armed infantry.
4. scutum ·noun 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. ·see the ·illust. under thorax.