To twitch; to cause to twitch convulsively.

To move spasmodically; to twitch; as, a nerve vellicates.

touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements

irritate as if by a nip, pinch, or tear; "smooth surfaces can vellicate the teeth"; "the pain is as if sharp points pinch your back"

10.156.10 up Pinch, tickle, irritate