Mo*lec"u*lar (?), a. [Cf. F. mol'eculare. 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. <-- now, compared with carbon-12 as standard -->


© Webster 1913.