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Measure , meas·ure / ˈmezhər/ • v. [tr.] 1. ascertain the size, amount, or degree of (something) by using an instrument or device marked in standard units or b… Hydrometer , hy·drom·e·ter / hīˈdrämitər/ • n. an instrument for measuring the density of liquids. DERIVATIVES: hy·dro·met·ric / ˌhīdrəˈmetrik/ adj. hy·drom·e·try… Gravimeter , gravimeter An instrument for measuring the gravitational acceleration. Most field instruments are relative instruments, i.e. they determine the diffe… Eyepiece , eyepiece (ocular) An eye lens, a fixed diaphragm with cross-wires, and a field lens, all contained in a short tube which is inserted into the top of… Goniometer , go·ni·om·e·ter / ˌgōnēˈämitər/ • n. an instrument for the precise measurement of angles, esp. one used to measure the angles between the faces of cry… INSTRUMENT , in·stru·ment / ˈinstrəmənt/ • n. 1. a tool or implement, esp. one for delicate or scientific work: a surgical instrument writing instruments. ∎ a thi…
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