atto-
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atto-
word element [Danish], eighteen; used in naming units of measurement to designate an amount one quintillionth (10−18) the size of the unit to which it is joined; symbol a.
atto- (a),
(at'ō),Prefix used in the SI and metric system to signify one quintillionth (10-18).
[Danish atten, eighteen]
atto-
Prefix used in the SI and in the metric system to signify one quintillionth (10-18).
[Danish atten, eighteen]