n. [ Gr. 'an priv. + 'orqo`s straight + -scope. ] (Physics) An optical toy for producing amusing figures or pictures by means of two revolving disks, on one of which distorted figures are painted. [ 1913 Webster ]
n. [ Ortho- + -scope. ] (Physiol.) An instrument designed to show the condition of the superficial portions of the eye. [ 1913 Webster ]