Definitions for "Cyclometer"
A contrivance for recording the revolutions of a wheel, as of a bicycle.
A measuring tool for a bicycle, usually measuring speed and distance traveled.
The cyclometer was a cryptologic device designed about 1934 by Marian Rejewski, of the Polish Cipher Bureau's German section (BS-4), to facilitate decryption of German Enigma ciphertext.
A meter with a spinning index, like an odometer, rather than dials. Often used to help customers read their own meters; they cause approximately 5x as many errors to experienced meter readers.