• (n.) An instrument for restoring a picture or image distorted by anamorphosis to its normal proportions. It usually consists of a cylindrical mirror.
An`a·mor'pho·scope noun [ Anamorpho sis + -scope .] An instrument for restoring a picture or image distorted by anamorphosis to its normal proportions. It usually consists of a cylindrical mirror. 
a curved mirror or other optical device for giving a correct image of a picture or the like distorted by anamorphosis.