What is the meaning of Scutum?

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

A scute.

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

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

The kneecap.

a type of shield: the scutum, the large oblong wooden shield carried by the Roman infantry

a shield

shield-bearing soldiers

a defense, protection, shelter

Source: wiktionary.org