Found 2 items, similar to illuminant.
English → English (WordNet) Definition: illuminant illuminant n : something that can serve as a source of light
English → English (gcide) Definition: Illuminant Illuminant \Il*lu"mi*nant\, n. [L. illuminans, -antis, p. pr. of illuminare.] That which illuminates or affords light; as, gas and petroleum are illuminants. --Boyle. [1913 Webster]