Electro-chronograph
Pronunciation : E*lec`tro-chron"o*graph
Part of Speech : n.
Definition : Defn: An instrument for obtaining an accurate record of the time at which any observed phenomenon occurs, or of its duration. It has an electro-magnetic register connected with a clock. See Chronograph.
(Astron. Physics)
Source : Webster's Unabridged Dictionary, 1913