Clues for the word "TACHOMETER"

We've had 4 crossword clues used for this word, and seen it 3 times in crosswords. It was last seen in Guardian Cryptic crossword on March 19, 2015.

Definition of tachometer

n. - An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance.
n. - 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.
n. - 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.
n. - An instrument for measuring the velocity of the blood; a haematachometer.