1. [ noun ] (physics and chemistry) the simplest structural unit of an element or compound
Related terms: substance unit protein_molecule coenzyme macromolecule dipole_molecule atom group chain physics chemistry
2. [ noun ] (nontechnical usage) a tiny piece of anything
Synonyms: particle speck corpuscle mote atom
Related terms: material grain chylomicron flyspeck atomize
Similar spelling:   molecular