transcription, транскрипция: [ noun ]
Date: 1820
: the mass of one atom of an element ; specifically : the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units — see element table
ATOMIC WEIGHT
Meaning of ATOMIC WEIGHT in English
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003