| Title | photometer |
|---|---|
| Text |
Merriam-Webster's Collegiate Dictionary pho·tom·e·ter \\fō-ˈtä-mə-tər\\ noun ETYMOLOGY New Latin photometrum, from phot- + -metrum -meter DATE 1778 : an instrument for measuring luminous intensity, luminous flux, illumination, or brightness Webster's Third New International Dictionary, Unabridged Search result show the entry is found in: wedge photometer , or colorimetric photometer , or flame photometer , or flicker photometer , or grease-spot photometer pho·tom·e·ter I. \fōˈtäməd.ə(r)\ noun Etymology: New Latin photometrum, from phot- + -metrum -meter : an instrument for measuring luminous intensity, luminous flux, illumination, or brightness by comparison of two unequal lights from different sources usually by reducing the illumination of one (as by varying the distance of the source or using a polarizing device) until the two lights appear equal, the amount of adjustment serving as the basis of comparison and the equality of illumination being judged by various means II. transitive verb : to examine with a photometer |
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