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molecular weight

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Molecular Weight
Absolute Particle Size and Mass Distribution. View Papers!
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molecular weight

 
Use molecular weight in a Sentence
–noun Chemistry.
the average weight of a molecule of an element or compound measured in units once based on the weight of one hydrogen atom taken as the standard or on 1/16 the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule. Abbreviation: mol. wt.
Also called formula weight.

Origin:
1875–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Molecular Weight
Absolute Particle Size and Mass Distribution. View Papers!
www.wyatt.com
Find Chemical Information
Chemical Substance Collection, Chemical Synthesis & References
www.cas.org
molecular weight  
n.   Abbr. mol. wt.
The sum of the atomic weights of all the atoms in a molecule. Also called formula weight.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

molecular weight [(muh-lek-yuh-luhr)]

The sum of the atomic weights of all the atoms in a molecule.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: molecular weight
Function: noun
: the mass of a molecule that may be calculated as the sum of the atomic weights of its constituent atoms
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

molecular weight n.
Abbr. mol wt, MW
The sum of the atomic weights of all the atoms in a molecule. Also called formula 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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Science Dictionary
molecular weight  
The sum of the atomic weights of the atoms contained in a molecule. Also called relative molecular mass.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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