actinograph defined in 1939 yearactinograph - Actinograph (Gr. aktis, ray: graphein, to write);
actinograph - Instrument used in conjunction with the Herichel actinometer for recording the variations in power of the solar rays. It is a self-registering photometer.
near actinograph in Knolik
definition of word "actinograph" was readed 900 times