atomic mass unit (amu)    یکای ِ جرم ِ اتمی     yekâ-ye jerm-e atomi (#) 
 Fr.: unité de masse atomique    A unit of mass used for atoms and molecules, equal to 1/12 of the mass
of an atom of carbon-12 (including orbital electrons). 
It is equal to 1.660 33 × 10-24 g. → atomic; → mass; → unit.  |