sir isaac newton siris • sir isaac pitman · · · Info · Definitions · Characters · · sir isaac newton · · Text Common · · Latin · · Scripts 16 · · Length 6 · · Syllables Definitions · · · (noun) English mathematician and physicist; remembered for developing the calculus and for his law of gravitation and his three laws of motion (1642-1727). Synonyms: Newton, Isaac Newton, Sir Isaac Newton. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 w latin small letter w U+0077