scutum

noun

1. 1

   An oblong shield made of boards or wickerwork covered with leather, with sometimes an iron rim; carried chiefly by the heavy-armed infantry of the Roman army.

2. 2

   A scute.

3. 3

   A shield-like protection, such as the scutum protecting the back of a hard tick (cf. alloscutum, conscutum)

4. 4

   One of the two lower valves of the operculum of a barnacle.

5. 5

   The kneecap.