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Definition of Nictitating spasm

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Nictitating spasm: Spasm of the eyelid with continuous winking.

To nictitiate is to wink. "Nictitate" and the older verb "nictate" both come from the Latin word for winking, "nictare."