atto-

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-

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 prefix in the metric system indicating a value of one quintillionth, or 10^-18.

atto-

Prefix used in the SI and in the metric system to signify one quintillionth (10^-18).

[Danish atten, eighteen]

atto-

a prefix signifying one million-million-millionth, or 10⁻¹⁸; symbol a.