Source : Webster's Revised Unabridged Dictionary (1913)

Molecular \Mo*lec"u*lar\, a. [Cf. F. mol['e]culare. See
   {Molecule}.] (Phys. & Chem.)
   Pertaining to, connected with, produced by, or consisting of,
   molecules; as, molecular forces; molecular groups of atoms,
   etc.

   {Molecular attraction} (Phys.), attraction acting between the
      molecules of bodies, and at insensible distances.

   {Molecular weight} (Chem.), the weight of a molecule of any
      gas or vapor as compared with the hydrogen atom as a
      standard; the sum of the atomic weights of the
      constituents of a molecule; thus, the molecular weight of
      water ({H2O}) is 18.

Source : WordNet®

molecular
     adj 1: relating to or produced by or consisting of molecules;
            "molecular structure"; "molecular oxygen"; "molecular
            weight is the sum of all the atoms in a molecul"
     2: relating to simple or elementary organization; "proceed by
        more and more detailed analysis to the molecular facts of
        perception"--G.A. Miller [syn: {molecular(a)}] [ant: {molar(a)}]