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formula weight

noun, Chemistry
(of a molecule) molecular weight.
(of an ionic compound that does not form molecules) the sum of the atomic weights of the atoms of the formula unit. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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formula-weight in Medicine

formula weight n.
See molecular 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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