| Electro-chronograph | n. (Astron. Physics) 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. [ 1913 Webster ] |
| Electro-chronographic | a. Belonging to the electro-chronograph, or recorded by the aid of it. [ 1913 Webster ] |