_kilo- 

_mega-

_giga-  

_tera-     

_peta- 

_exa-  

_milli-

_micro-

_nano-  

_pico-

_femto- 

_atto- 

_macro- 

_magni- 

_micro-  

Meaning 

_thousand 

_million

_billion

   _trillion     

_quadrillion 

_quintillion 

_thousandth

_millionth

_billionth

     _trillionth  

_{quadrillionth}  

_{quintillionth}

_{large, long}

_great 

_{small, short}

Example

_kilometer

_megameter

_gigameter

_terameter

_petameter

_examillion

_millisecond

_microsecond

_nanosecond

_picosecond

_femtosecond

_attosecond

_macroscopic

_magnify

_microbe