colorimeter Syllabification: (col·or·im·e·ter)Pronunciation: /ˌkələˈrimitər/Definition of colorimeter noun an instrument for measuring the intensity of color. Derivatives colorimetricPronunciation: /ˌkələrəˈmetrik/ adjective colorimetryPronunciation: /ˌkələˈrimitrē/ noun Origin: mid 19th century: from Latin color 'color' + -metercolorimeter in other Oxford dictionaries Definition of colorimeter in the British & World English dictionary