Etymology
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molecular (adj.)

"relating to or consisting of molecules," by 1815, from molecule + -ar or else from French moléculaire or Modern Latin molecularis. Molecular biology is attested by 1950.

updated on February 10, 2019

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Definitions of molecular from WordNet

molecular (adj.)
relating to simple or elementary organization; "proceed by more and more detailed analysis to the molecular facts of perception"--G.A. Miller;
molecular (adj.)
relating to or produced by or consisting of molecules;
molecular oxygen
molecular weight is the sum of all the atoms in a molecule
molecular structure
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.