Mĕt'ro-grāph, n.
n. [Gr. μέτρον, measure, and γράφειν, to record.] An instrument which records the speed of a railway train, and the hour of arrival and departure at each station. Simmonds.
n. [Gr. μέτρον, measure, and γράφειν, to record.] An instrument which records the speed of a railway train, and the hour of arrival and departure at each station. Simmonds.