METROGRAPH
Met"ro*graph, n. Etym: [Gr. -graph.]
Defn: An instrument attached to a locomotive for recording its speed and the number and duration of its stops.
METROLOGICAL
Met`ro*log"ic*al, a. Etym: [Cf. F. métrologique.]
Defn: Of or pertaining to metrology.
METROLOGY
Me*trol"o*gy, n. Etym: [Gr. -métrologie.]
Defn: The science of, or a system of, weights and measures; also, a treatise on the subject.
METROMANIA
Met`ro*ma"ni*a, n. Etym: [Gr. mania.]
Defn: A mania for writing verses.
METROMANIAC
Met`ro*ma"ni*ac, n.
Defn: One who has metromania.