molecular formula

noun Chemistry.

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

Origin of molecular formula

First recorded in 1900–05 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for molecular formula

molecular formula


a chemical formula indicating the numbers and types of atoms in a moleculeH 2 SO 4 is the molecular formula of sulphuric acid Compare empirical formula, structural formula
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 in Medicine

molecular formula


A chemical formula that shows the number and kinds of atoms in a molecule.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

molecular formula in Science

molecular formula

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 C9H8O4. Compare empirical formula structural formula.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.