iota

If you don't care one iota about something, it means you don’t care about it even one little bit. An iota is something very small.

An iota is the smallest letter of the Greek alphabet. The expression "not one iota" comes from the Bible (Matthew 5:18): "For truly, I say to you, until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished."

Primary Meanings of iota

1.
n
a tiny or scarcely detectable amount
2.
n
the 9th letter of the Greek alphabet
Full Definitions of iota
1

n a tiny or scarcely detectable amount

Synonyms:
scintilla, shred, smidge, smidgen, smidgeon, smidgin, tittle, whit
Type of:
small indefinite amount, small indefinite quantity
an indefinite quantity that is below average size or magnitude
2

n the 9th letter of the Greek alphabet

Type of:
alphabetic character, letter, letter of the alphabet
the conventional characters of the alphabet used to represent speech

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