noun: (historical, Roman antiquity) 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.
noun: (zoology) A scute.
noun: (zoology) A shield-like protection, such as the scutum protecting the back of a hard tick (cf. alloscutum, conscutum)
noun: (zoology) One of the two lower valves of the operculum of a barnacle.
noun: (anatomy) The kneecap.
noun: (astronomy) A small autumn constellation of the northern sky, said to resemble a shield. It lies between the constellations of Aquila, Sagittarius, and the tail of Serpens.
