Tachymeter

n.	1.	(Surveying) An instrument, esp. a transit or theodolite with stadia wires, for determining quickly the distances, bearings, and elevations of distant objects.
	2.	A speed indicator; a tachometer.

Noun

1.

tachymeter - a theodolite designed for rapid measurements Synonyms: tacheometer

tacheometer, theodolite, transit