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British Dictionary definitions for relative atomic mass

relative atomic mass

noun
  1. the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12Symbol: A r Abbreviation: r.a.m. Former name: atomic weight
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

relative atomic mass in Science

relative atomic mass

[rĕlə-tĭv]
  1. See atomic weight.
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