evolvent
/ɪˈvɒlv(ə)nt/adjective
1That evolves or causes to evolve. Now rare.
- evolvent line noun Geometry Obsolete a straight line, perpendicular to a given curve, joining a point on the curve to its centre of curvature at that point..
2 Hinduism. 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. rare.
noun
1 Geometry. The involute of a curve. Now rare.
2 Hinduism. 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. rare.
Origin
Early 18th century. From classical Latin ēvolvent-, ēvolvēns, present participle of ēvolvere. In evolvent line after post-classical Latin recta evolvens; compare French développante, feminine noun.