A user suggests that this English entry be cleaned up.
Please see the discussion on Requests for cleanup(+) for more information and remove this template after the problem has been dealt with.

English

edit

Etymology

edit

From micro- +‎ milligram.

Noun

edit

micromilligram (plural micromilligrams)

  1. Alternative spelling of nanogram. symbol:ŋmg

Also, British, micromilligramme.