infinitesimal
adjective /ˌɪnfɪnɪˈtesɪml/
/ˌɪnfɪnɪˈtesɪml/
(formal)- extremely small synonym tiny
- infinitesimal traces of poison
- an infinitesimal risk
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.