natural glass natural gas • natural history · · · Info · Definitions · Characters · · natural glass · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) magma of any composition that cooled very rapidly. Synonyms: natural glass. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 g latin small letter g U+0067 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075