infinitesimal calculus infinitesimal • infinitesimalism · · · Info · Definitions · Synonyms · Characters · · infinitesimal calculus · · Text Common · · Latin · · Scripts 22 · · Length 9 · · Syllables Definitions · · · (noun) the branch of mathematics that is concerned with limits and with the differentiation and integration of functions. Synonyms: calculus, infinitesimal calculus. · · Noun Definition 1 Synonyms · · · calculus · · Synonym 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 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C 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