SAT GRE iota Definition A very small amount; the smallest possible quantity. Example "I don't have a single iota of doubt about her honesty." Sign in to save SAT Quiz → GRE Quiz → ← ionosphere irascible → Study tips featuring "iota" Spot the Vocabulary Trap in Every Question Write GRE Words Into Your Own Sentences How Context Clues Save You on the SAT Related words SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal SAT abominable