in·fin·i·tes·i·mal
adjective/ˌɪnfɪnɪˈtesɪml/
/ˌɪnfɪnɪˈtesɪml/
(formal)- extremely small
极小的；微小的；细微的 - infinitesimal traces of poison
微量毒素 - an infinitesimal risk
微乎其微的风险
Word Originmid 17th cent.: from modern Latin infinitesimus, from Latin infinitus, from in- ‘not’ + finitus ‘finished, finite’, past participle of finire, from finis ‘end’, on the pattern of centesimal. - infinitesimal traces of poison