Definition of Molecule

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Molecule

One of the very small invisible particles of which all matter is supposed to consist.

The smallest part of any substance which possesses the characteristic properties and qualities of that substance, and which can exist alone in a free state.

A group of atoms so united and combined by chemical affinity that they form a complete, integrated whole, being the smallest portion of any particular compound that can exist in a free state; as, a molecule of water consists of two atoms of hydrogen and one of oxygen. Cf. Atom.

Related Definitions:

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Molecule Quotations

It now seems certain that the amino acid sequence of any protein is determined by the sequence of bases in some region of a particular nucleic acid molecule.
Francis Crick

The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body.
Dmitri Mendeleev

I tell my students to try to know molecules, so well that when they have some question involving molecules, they can ask themselves, What would I do if I were that molecule?
George Wald

The laws of physics should allow us to arrange things molecule by molecule and even atom by atom, and at some point it was inevitable that we would develop a technology that would let us do this.
Ralph Merkle

We may say that a basic substance is one which has a lone pair of electrons which may be used to complete the stable group of another atom, and that an acid is one which can employ a lone pair from another molecule in completing the stable group of one of its own atoms.
Gilbert Newton Lewis

On the basis of Lorentz's theory, if we limit ourselves to a single spectral line, it suffices to assume that each atom (or molecule) contains a single moving electron.
Pieter Zeeman

Molecule Translations

molecule in Dutch is molecuul
molecule in Italian is molecola
molecule in Swedish is molekyl

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