Atto-

Origin

From , extending the idea to how femto- is derived from and the fermi unit.

Prefix

In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10

âˆ’18 (short scale quintillionth or long scale trillionth). Symbol: a

Antonyms

exa-

Derived terms

Anagrams