• WordNet 3.6
    • n molecule (nontechnical usage) a tiny piece of anything
    • n molecule (physics and chemistry) the simplest structural unit of an element or compound
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: Researchers have developed odourless socks. The sock fabric is made by attaching molecules that contain chlorine called halamines to textile fibers
    • Molecule (Chem) 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.
    • Molecule One of the very small invisible particles of which all ordinary matter is supposed to consist.
    • Molecule (Physics) 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.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: On average, there is about three molecules of ozone for every 10 million air molecules.
    • n molecule The smallest mass of any substance which is capable of existing in a separate form — that is, the smallest part into which the substance can be divided without destroying its chemical character (identity). All the physical changes of a body, as the dissolving of sugar in water, the melting of lead, the change of water into steam, the magnetization of steel, and so on, are phenomena which take place without the loss of identity of the substance itself, and which concern the relations of the molecules among themselves. Hence the molecule is taken as the physical unit. A homogeneous body is regarded as made up of similar molecules, whose relations determine its physical qualities, and particularly its physical state as a gas, liquid, or solid. A gas, according to the kinetic theory of gases, is composed of molecules darting about in paths which are very nearly rectilinear through the greater part of their lengths. Liquids are supposed to be composed of molecules which wander about, but have not nearly rectilinear paths; while solids are believed to be composed of molecules bound together by cohesion and moving in quasi-orbital paths. A molecule of any substance is conceived as made up of one or more atoms, whose relations to each other are considered in chemistry. (See atom.) The exact nature of the molecules is still largely a matter of hypothesis, but as regards their size Sir William Thomson has reached a quasi-definite conclusion as follows: “If a drop of water were magnified to the size of the earth, the molecules or granules would each occupy spaces greater than those filled by small shot and smaller than those occupied by cricket-balls.”
    • n molecule A very small particle or bit of something; a particle; an atom.
    • n molecule In ornithology, the tread or cicatricula of a fecundated ovum.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The number of times a drowning person will rise to the surface depends on how much air is in his lungs. He could rise once, twice, or five times. Or not at all. Obese people will stay afloat longer than skinny people because fat contains air molecules.
    • n Molecule mol′e-kūl one of the minute particles of which matter is composed: the smallest mass of any substance which retains the properties of that substance
    • ***


  • Glenn Close
    Glenn Close
    “I really think that effective acting has to do literally with the movement of molecules.”


Webster's Revised Unabridged Dictionary
Dim. fr. L. moles, a mass: cf. F. molécule,. See 3d Mole
Chambers's Twentieth Century Dictionary
Fr.,—L. moles, a mass.


In literature:

I walked on down the room, feeling as conspicuous as a cheer leader at a wake, while five pairs of eyes sorted me over molecule by molecule.
"Call Him Savage" by John Pollard
Turacin itself gives a peculiar two-banded spectrum, and contains about 7% of copper in its molecule.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
But what has built together the molecules of the corn?
"The Voice of Science in Nineteenth-Century Literature" by Various
The latter formula supposes the molecules to be rigid spheres of invariable size.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7" by Various
The demon sees a hot molecule coming, he opens the door.
"A Feast of Demons" by William Morrison
Substituting this value for X, we find u = 66 cm./sec, for the velocity of a hydrogen molecule.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8" by Various
It forms dark blue prismatic crystals containing 3, 4, or 6 molecules of water according to the temperature of crystallization.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3" by Various
Are his molecules loose and do they edge aside for obstacles, compress together when he wants to shrink, and so on?
"The Giants From Outer Space" by Geoff St. Reynard
Consider now the problem of diffusion in a region containing two kinds of molecules A and B of unequal mass.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
A slight rumble went through the ship, a rumble seemingly radiated from every molecule, from every atom, in the vessel.
"Planet of the Gods" by Robert Moore Williams

In poetry:

Remember the walker upon it?
Meaning leaks from the molecules.
The chimneys of the city breathe, the window sweats,
The children leap in their cots.
The sun blooms, it is a geranium.
"Mystic" by Sylvia Plath

In news:

Disteardimonium Hectorite This molecule is like a squid with a nitrogen body and fatty alcohol tentacles.
Her books include Chasing Molecules and High Tech Trash.
Researchers synthesized the basic ingredients of RNA, a molecule from which the simplest self-replicating structures are made.
Evotec to Run NIH Small Molecule Repository .
Reshuffling water molecules could propel Navy's aircraft, but tech has a long way to go.
A Sisyphean task for polar molecules.
Solar cell consisting of a single molecule.
Solar cell consists of a single molecule.
Previously focused on the synthesis of plant molecules, the.
Previously focused on the synthesis of plant molecules, the Northwestern University researcher now aims to use his knowledge to help develop cancer-killing drugs that won't make patients sick.
Chemists synthesize smallest five-ringed molecule.
Chemists have made and imaged the smallest possible molecule containing five rings.
France-based Domain is dedicated to the discovery and early development of small molecules targeting GPCRs.
What's amazing is how much of the new value in the ADHD field has come from new formulations, not new molecules .
Pharmacyclics Inks Agreement With Novo Nordisk for Molecule Inhibitor.

In science:

Including a second laser, bound-bound transitions remove excited molecules from state |2i and create stable molecules in state |3i.
Improved efficiency of stimulated Raman adiabatic passage in photoassociation of a Bose-Einstein condensate
In second quantized notation, boson annihilation operators for atoms, primarily photoassociated molecules, and stable molecules are denoted, respectively, by a, b, and g .
Improved efficiency of stimulated Raman adiabatic passage in photoassociation of a Bose-Einstein condensate
The laser-matter interactions that drive the atom-molecule and molecule-molecule transitions are characterized by their respective Rabi frequencies κ and Ω.
Improved efficiency of stimulated Raman adiabatic passage in photoassociation of a Bose-Einstein condensate
When the collective-enhanced atom-molecule coupling satisfies χ0 & ωρ , transitions to noncondensate modes are expected to dominate atom-molecule conversion.
Improved efficiency of stimulated Raman adiabatic passage in photoassociation of a Bose-Einstein condensate
An element of charge at position s (specified in two dimensions relative to the molecule centerof-mass line) on the molecule responds to the local electric field according to χ0 (s; u) given by (3).
van der Waals interaction of parallel polymers and nanotubes