That evolves or causes to evolve.

In Sankhya philosophy: (of a principle of nature or being) that gives rise to other principles of nature or being; that is the cause of the existence of other phenomena.

The involute of a curve.

In Sankhya philosophy: a principle of nature or being that gives rise to other principles of nature or being; a cause of the existence of other phenomena. Sometimes: specifically such a principle which itself derives from another, and is not a root cause of being.