einsteinium Einsteinian • einstein's general theory of relativity · · · Info · Definitions · Synonyms · Characters · · einsteinium · · Text Latin · · Script 11 · · Length 6 · · Syllables Definitions · · · (noun) a radioactive transuranic element produced by bombarding plutonium with neutrons. Synonyms: Es, E, atomic number 99. · · Noun Definition 1 Synonyms · · · es · · Synonym 1 e · · Synonym 2 atomic number 99 · · Synonym 3 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075