| ACTINOMETER | • actinometer n. (Physics) A device used to measure the heating power of electromagnetic radiation, especially that of solar radiation. • ACTINOMETER n. an instrument for measuring incident radiation.
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| AUXANOMETER | • auxanometer n. An instrument to measure the growth of plants. • AUXANOMETER n. an instrument for measuring growth of plants.
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| CAPNOMETERS | • capnometers n. Plural of capnometer. | 
| CHRONOMETER | • chronometer n. A device for measuring time, such as a watch or clock. • CHRONOMETER n. an instrument for measuring time.
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| CLINOMETERS | • clinometers n. Plural of clinometer. • CLINOMETER n. an instrument for measuring the incline (slope) of a surface.
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| CYANOMETERS | • cyanometers n. Plural of cyanometer. • CYANOMETER n. instrument for measuring blueness of the sky or ocean.
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| ECONOMETERS | • ECONOMETER n. a device in a car that informs the driver of how much fuel they are consuming. | 
| ICONOMETERS | • iconometers n. Plural of iconometer. • ICONOMETER n. an instrument for finding the size of an object by measuring its image.
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| PHONOMETERS | • phonometers n. Plural of phonometer. • PHONOMETER n. an instrument for measuring sound levels, also PHONMETER.
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| PLANOMETERS | • planometers n. Plural of planometer. • PLANOMETER n. an instrument for gauging or testing the flatness of a plane surface.
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| PYCNOMETERS | • pycnometers n. Plural of pycnometer. • PYCNOMETER n. an instrument for measuring specific gravity or density, also PYKNOMETER.
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| PYKNOMETERS | • pyknometers n. Plural of pyknometer. • PYKNOMETER n. an instrument for measuring specific gravity or density, also PYCNOMETER.
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| PYRANOMETER | • pyranometer n. An actinometer used to measure solar radiation incident on a surface. • PYRANOMETER n. another name for a solarimeter.
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| SALINOMETER | • salinometer n. A salimeter. • SALINOMETER n. an instrument for measuring the amount of salt present in any given solution, also SALIMETER, SALOMETER.
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| URINOMETERS | • urinometers n. Plural of urinometer. • URINOMETER n. an instrument for measuring the specific gravity of urine.
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