What's the difference between vellication and vellicative?

Vellication

Definition:

• () The act of twitching, or of causing to twitch.
• () A local twitching, or convulsive motion, of a muscular fiber, especially of the face.

Example Sentences:

Vellicative

Definition:

• (a.) Having the power of vellicating, plucking, or twitching; causing vellication.

Example Sentences: