millimilligramWiktionary 原文英美构词拆解millimillimillimilli-前缀gramgram词干millimilli-(obsolete) micro- (in the names of SI units)也可拆解为millimilli-前缀milligrammilligram词干milli-In the International System of Units and other metric systems of units, one-thousandth of the unit to which it is prefixed; that is, multiplying the unit to which it is attached by 10-3. Symbol: m. · thousand词源说明From millimilli- + gram / milli- + milligram.释义名词noun1rare and nonstandard0.000001 grams, as a unit of mass.