CARBON 12


Meaning of CARBON 12 in English

the isotopic carbon atom that comprises 99 percent of naturally occurring carbon, and that since 1961 has been used as the standard for atomic weight by representing a unit of 12.00000.

Also, carbon-12 /kahr"beuhn twelv"/ .

[ 1940-45 ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .