antimony antimonsoon • antimonyl · · · Info · Definitions · Synonyms · Characters · · antimony · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite. Synonyms: Sb, atomic number 51. · · Noun Definition 1 Synonyms · · · sb · · Synonym 1 atomic number 51 · · Synonym 2 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 y latin small letter y U+0079