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molecular formula

American  

noun

Chemistry.

  1. a chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.

molecular formula British  

noun

  1. a chemical formula indicating the numbers and types of atoms in a molecule Compare empirical formula structural formula

    H2SO4 is the molecular formula of sulphuric acid
"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
molecular formula Scientific  

  1. A chemical formula that shows the total number and kinds of atoms in a molecule, but not their structural arrangement. For example, the molecular formula of aspirin is C 9 H 8 O 4.

  2. Compare empirical formula structural formula

Etymology

Origin of molecular formula

First recorded in 1900–05

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.