it means one septillionth (10-24).
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The smallest official prefix is yocto which is 1 x 10−24, which 1 with 23 zeros in front of it. This isn't used very often.
There is no prefix in follow...
Prefix could be:MetaAltiMegaNeo
The prefix "co-" could be used with the act.
One prefix that can be used with convene is reconvene.
"Un" can be used as a prefix, giving unlock.
The prefix "sono-" is used for sonic, which means related to sound.
semi is a prefix that can used with tone -- semitone
One prefix would be un-, as in unimaginable.
Yes, dis- is a prefix. This prefix means not.
The commonly used prefix for state is "re-".
"Exo-" is a prefix that can be used to convey the meaning of "measure."