a sudden, quick movement of a muscle, especially in your face or head, that you cannot control （尤指面部或头部肌肉的）抽搐 a nervous tic 神经抽搐 There was a persistent tic in her left cheek. 她的左脸颊上有一阵阵抽动。
Word Originearly 19th cent.: from French, from Italian ticchio.