at wt

Medical Dictionary

atomic weight n.
Abbr. at wt, AW
The average mass of an atom of an element, usually expressed relative to the atomic mass of carbon 12.

American Heritage
Medical Dictionary

at wt abbr.
atomic weight

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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