GRE TOEFL infinitesimal Definition Extremely small; tiny, often too small to measure. Example "The chance of winning the lottery is infinitesimal." Sign in to save GRE Quiz → TOEFL Quiz → ← infinite infinity → Study tips featuring "infinitesimal" Group Words Together by Emotional Tone Map Each Word Into a Connected Network Force Contrast Between Two Similar Words Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant