| 释义 |
atto-
atto-pref. One quintillionth (10-18): attotesla.
[From Danish or Norwegian atten, eighteen, from Old Norse āttjān; see oktō(u) in Indo-European roots.]atto- prefix denoting 10–18: attotesla. Symbol: a [from Norwegian, Danish atten eighteen]atto- a combining form denoting one-quintillionth (10−18) the size of the unit denoted by the second element of the compound: attosecond. [< Dan or Norwegian att(en) eighteen + -o-] atto-A prefix meaning a quintillionth (10-18). For example, 1 attometer = 1 quintillionth of a meter.atto-
atto-[′ad·ō] (physics) A prefix representing 10-18, which is 0.000 000 000 000 000 001, or one-millionth of a millionth of a millionth. Abbreviated a. 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- Prefix used in the SI and in the metric system to signify one quintillionth (10-18). [Danish atten, eighteen]AcronymsSeeA |