noun
iota
eye-OH-tuh
noun
1
The ninth letter of the Greek alphabet.
"Iota is written as a simple vertical stroke in Greek."
2
A very tiny amount; the smallest bit of something.
"There isn't an iota of truth in that rumor."
How to Use Iota
Learner’s notesIn plain EnglishA microscopic amount — used mostly in the phrase "not one iota."
Common pairings
not one iota
not an iota of
Word Forms
iotas plural, IOTAs plural
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Etymology
From Greek iota, the name of the smallest letter in the Greek alphabet — used figuratively for centuries to mean "the tiniest amount," echoing a line from the New Testament about not changing "one iota" of the law.