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[muh-lek-yuh-ler] /məˈlɛk yə lər/
of or relating to or caused by molecules:
molecular structure.
Origin of molecular
1815-25; molecule + -ar1
Related forms
molecularly, adverb
multimolecular, adjective
nonmolecular, adjective
submolecular, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for molecular
Contemporary Examples
Historical Examples
  • The figures that are necessary to use in connection with molecular Substance are likely to stagger the imagination.

    Dynamic Thought William Walker Atkinson
  • Arcot accelerated away from it as Fuller hit it with a molecular beam.

    Islands of Space John W Campbell
  • As if by a giant plow, the valley was torn and rent in great streaks by the pale violet rays of the molecular force.

    Islands of Space John W Campbell
  • Then Morey held it with a molecular beam, and I tried twisting it.

    The Black Star Passes John W Campbell
  • The molecular theory is, unquestionably, tenable under present conditions.

    Steam Steel and Electricity James W. Steele
British Dictionary definitions for molecular


/məʊˈlɛkjʊlə; mə-/
of or relating to molecules: molecular hydrogen
(logic) (of a sentence, formula, etc) capable of analysis into atomic formulae of the appropriate kind
Derived Forms
molecularity (məʊˌlɛkjʊˈlærɪtɪ) noun
molecularly, adverb
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
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Word Origin and History for molecular

1823, from molecule + -ar or else from French moléculaire or Modern Latin molecularis. Molecular biology first attested 1950.

Online Etymology Dictionary, © 2010 Douglas Harper
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molecular in Medicine

molecular mo·lec·u·lar (mə-lěk'yə-lər)
Of, relating to, or consisting of molecules.

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