Definify.com
Webster 1913 Edition
Cyclometer
Cy-clom′e-ter
(s?-kl?m′?-t?r)
, Noun.
 [
Cyclo- 
+ -meter
.] A contrivance for recording the revolutions of a wheel, as of a bicycle. 
Definition 2025
cyclometer
cyclometer
English
Noun
cyclometer (plural cyclometers)
- A device that counts the revolutions of a bicycle wheel in order to indicate distance travelled.
 - An instrument for measuring circular arcs.
 - A machine used to decrypt Enigma machine ciphers.