Meaning & use
Dalton
Last updated
A unit of mass used to express the mass of atoms and molecules, equal to one-twelfth the mass of a carbon-12 atom; also called an atomic mass unit.
See it in a sentence
The protein has a molecular weight of about 50,000 daltons.
Scientists measure the mass of small molecules in daltons rather than grams.
A note on using this word
Named after English chemist John Dalton, a pioneer of atomic theory; the symbol for the unit is "Da."
Words with a similar meaning
atomic mass unitamu
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