Where does “micromilligram” come from?

micromilligram (English) comes from English micro, from Ancient Greek μικρός, from Proto-Indo-European mēy- — soft, tender, dear.

micromilligram (English): Alternative spelling of nanogram. symbol:ŋmg;...

Definitions

  1. Alternative spelling of nanogram. symbol:ŋmg;...

Ancestry of “micromilligram”, step by step

micromilligram traces back through two separate lines of ancestry.

via English micro

StepLanguageWordMeaning
1EnglishmicroSmall, relatively small; short form of...
2Ancient Greekμικρόςlittle, small
3Proto-Indo-Europeanmēy-soft, tender, dear

via English milligram

StepLanguageWordMeaning
1EnglishmilligramAn SI unit of mass, equivalent to one thousandth...
2Frenchmilligrammemilligram
Every word from Proto-Indo-European mēy-Every word from Ancient Greek μικρόςEvery word from English micro
micromilligram — Etymology, Origin & Word History | Etymology Explorer