'Cymometer' definitions:

Definition of 'Cymometer'

From: GCIDE

Cymometer \Cy*mom"e*ter\, n. [Gr. ? wave -meter.] An instrument for exhibiting and measuring wave motion; specif. (Elec.), an instrument for determining the frequency of electic wave oscillations, esp. in connection with wireless telegraphy. [Webster 1913 Suppl.]