lithium lithite • lithium carbonate · · · Info · Definitions · Synonyms · Characters · · lithium · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals. Synonyms: Li, atomic number 3. · · Noun Definition 1 Synonyms · · · li · · Synonym 1 atomic number 3 · · Synonym 2 Characters · · h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D t latin small letter t U+0074 u latin small letter u U+0075