Definition:Three-Dimensional Figure/Also known as

Three-Dimensional Figure: Also known as

A common term for a three-dimensional figure is solid figure.

However, this is misleading, as it is usual to be studying the surfaces of such figures, which themselves are not solid as such.

In the words of Euclid:

A solid is that which has length, breadth, and depth.

(The Elements: Book $\text{XI}$: Definition $1$)