mo·lec·u·lar

[muh-lek-yuh-ler]
adjective
of or pertaining to or caused by molecules: molecular structure.

Origin:
1815–25; molecule + -ar1

mo·lec·u·lar·ly, adverb
mul·ti·mo·lec·u·lar, adjective
non·mo·lec·u·lar, adjective
sub·mo·lec·u·lar, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
molecular (məʊˈlɛkjʊlə, mə-) [Click for IPA pronunciation guide]
 
adj
1.  of or relating to molecules: molecular hydrogen
2.  logic (of a sentence, formula, etc) capable of analysis into atomic formulae of the appropriate kind
 
molecularity
 
n
 
mo'lecularly
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Molecular is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a gadget; dingus; thingumbob.
Etymonline
Word Origin & History

molecular
1823, from molecule. Molecular biology first attested 1950.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

molecular mo·lec·u·lar (mə-lěk'yə-lər)
adj.
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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Example sentences
Bring in modern microscopic and molecular evidence, and you can trace the
  similarities still further back.
All stuff, whether natural or unnatural, is at the microscopic level molecular.
No hobby could be more useful to molecular biologists.
Yet only a fraction of the known silk types have been identified at the
  molecular level.
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