atomic mass unit
atomic mass unit
nounDefinition of ATOMIC MASS UNIT
: a unit of mass for expressing masses of atoms, molecules, or nuclear particles equal to 1⁄12 the mass of a single atom of the most abundant carbon isotope 12C —called also dalton
See First Known Use of ATOMIC MASS UNIT
circa 1942
Learn More About ATOMIC MASS UNIT
Browse
Next Word in the Dictionary: atomic number
Previous Word in the Dictionary: atomic mass
All Words Near: atomic mass unit
Previous Word in the Dictionary: atomic mass
All Words Near: atomic mass unit
Seen & Heard 
What made you want to look up atomic mass unit? Please tell us where you read or heard it (including the quote, if possible).
