Found 2 items, similar to Tachometer.
English → English (WordNet) Definition: tachometer tachometer n : measuring instrument for indicating speed of rotation [syn: tach]
English → English (gcide) Definition: Tachometer Tachometer \Ta*chom"e*ter\, n. [Gr. ta`chos swiftness, speed (fr. tachy`s quick) + -meter: cf. F. tachom[`e]tre.] An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance. Specifically: [1913 Webster] (a) An instrument for measuring the velocity of running water in a river or canal, consisting of a wheel with inclined vanes, which is turned by the current. The rotations of the wheel are recorded by clockwork. [1913 Webster] (b) An instrument for showing at any moment the speed of a revolving shaft, consisting of a delicate revolving conical pendulum which is driven by the shaft, and the action of which by change of speed moves a pointer which indicates the speed on a graduated dial. [1913 Webster] (c) (Physiol.) An instrument for measuring the velocity of the blood; a h[ae]matachometer. [1913 Webster]