basalt basal placentation • basal temperature · · · Info · Definitions · Characters · · basalt · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene. · · Noun Definition 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 l latin small letter l U+006C s latin small letter s U+0073 t latin small letter t U+0074