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“tachymeter”
tachymeter
An instrument used in surveying to work out distances, elevations, and directions at speed.
This entry is located in the following units:
meter-, metro-, metr-, -metrical, -metrically, -metron, -metric, -metrist, -meter, -meters, -metry, -metre
(page 39)
tacho-, tach-, tachy-
(page 3)