millimass unitとは 意味・読み方・使い方

The milli mass unit or (mmu) is used as a unit of mass by some scientific authors even though this unit is not defined by the IUPAP red book nor by the IUPAC green book. It is a short form of the tongue-breaking but formally more correct "milli unified atomic mass unit" (mu) and equivalent to 1/1000 of the unified atomic mass unit (u). A more modern name is the millidalton (mDa) since the "unified atomic mass unit" is more and more displaced by the unit dalton. (1 Da = 1 u)