combining form 1. a variant of tachy-
noun 1. (surveying) a type of theodolite designed for the rapid measurement of distances, elevations, and directions
noun 1. (surveying) the measurement of distance, etc, using a tacheometer
tachetic ta·chet·ic (tə-kět’ĭk, tā-) adj. Or, relating to, or marked by bluish or brownish spots.