atto-
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a combining form that enters into compounds denoting a unit one-quintillionth (10−18) the size of the unit named by the stem.
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Origin of atto-
Words nearby atto-
attitudinize, Attius, Attleboro, Attlee, attn., atto-, attolaser, attophysics, attorn, attorney, attorney-at-law
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use atto- in a sentence
British Dictionary definitions for atto-
atto-
prefix
denoting 10 –18attotesla Symbol: a
Word Origin for atto-
from Norwegian, Danish atten eighteen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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