[loo-muh-niz-uh m] /ˈlu məˌnɪz əm/
a style of landscape painting practiced by some mid-19th-century American artists, especially of the Hudson River School, that emphasized meticulously crafted realism and a technically precise rendering of atmosphere and of the effects produced by direct and reflected light.
[loo-muh-nif-er-uh s] /ˌlu məˈnɪf ər əs/ adjective 1. producing light: the luminiferous properties of a gas. luminiferous lu·mi·nif·er·ous (lōō’mə-nĭf’ər-əs) adj. Generating, yielding, or transmitting light.
[loo-muh-nuh-fawr, -fohr] /ˈlu mə nəˌfɔr, -ˌfoʊr/ noun, Physics, Chemistry. 1. a molecule or group of molecules that emits light when illuminated. luminophore lu·mi·no·phore (lōō’mə-nə-fôr’) n. An atom or atomic grouping that when present in an organic compound increases the ability of the compound to luminesce.
[loo-muh-nos-i-tee] /ˌlu məˈnɒs ɪ ti/ noun, plural luminosities. 1. (def 2). 2. the quality of being intellectually brilliant, enlightened, inspired, etc.: The luminosity of his poetry is unequaled. 3. something . 4. Astronomy. the brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic […]
noun, Astronomy. 1. a classification of stars of a given spectral type according to their luminosity, breaking them down into dwarfs, giants, and supergiants.