the smallest particle of an element or compound that can exist in the free state and still retain the characteristics of the element or compound: the molecules of elements consist of one atom or two or more similar atoms; those of compounds consist of two or more different atoms
a small particle
Fr molécule < ModL molecula, dim. of L moles, a mass: see mole
The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms; a group of like or different atoms held together by chemical forces.
A small particle; a tiny bit.
Origin: French molécule, from New Latin mōlēcula, diminutive of Latin mōlēs, mass.
A group of two or more atoms linked together by sharing electrons in a chemical bond. Molecules are the fundamental components of chemical compounds and are the smallest part of a compound that can participate in a chemical reaction.