Crossword clues for molecule
- Chemistry class model
- Tiny bit
- (physics and chemistry) the simplest structural unit of an element or compound
- (nontechnical usage) a tiny piece of anything
- Group of atoms bonded together
- Mark cryptic clue for tiny thing
- Spot complicated clue - but it only a little matter
- Smallest particle of a substance
- Undercover spy misplaced clue? It’s a little matter
- Bond part
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Molecule \Mol"e*cule\, n. [Dim. fr. L. moles a mass: cf. F. mol['e]cule. See 3d Mole.]
One of the very small invisible particles of which all ordinary matter is supposed to consist.
(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.
(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.
Douglas Harper's Etymology Dictionary
1794, "extremely minute particle," from French molécule (1670s), from Modern Latin molecula, diminutive of Latin moles "mass, barrier" (see mole (3)). A vague meaning at first; the vogue for the word (used until late 18c. only in Latin form) can be traced to the philosophy of Descartes. First used of Modern Latin molecula in modern scientific sense by Amedeo Avogadro (1811).
n. (context chemistry English) The smallest particle of a specific element or compound that retains the chemical properties of that element or compound; two or more atoms held together by chemical bonds.
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge. However, in quantum physics, organic chemistry, and biochemistry, the term molecule is often used less strictly, also being applied to polyatomic ions.
In the kinetic theory of gases, the term molecule is often used for any gaseous particle regardless of its composition. According to this definition, noble gas atoms are considered molecules as they are in fact monoatomic molecules.
A molecule may be homonuclear, that is, it consists of atoms of a single chemical element, as with oxygen (O); or it may be heteronuclear, a chemical compound composed of more than one element, as with water (HO). Atoms and complexes connected by non-covalent bonds such as hydrogen bonds or ionic bonds are generally not considered single molecules.
Molecules as components of matter are common in organic substances (and therefore biochemistry). They also make up most of the oceans and atmosphere. However, the majority of familiar solid substances on Earth, including most of the minerals that make up the crust, mantle, and core of the Earth, contain many chemical bonds, but are not made of identifiable molecules. Also, no typical molecule can be defined for ionic crystals ( salts) and covalent crystals ( network solids), although these are often composed of repeating unit cells that extend either in a plane (such as in graphene) or three-dimensionally (such as in diamond, quartz, or sodium chloride). The theme of repeated unit-cellular-structure also holds for most condensed phases with metallic bonding, which means that solid metals are also not made of molecules. In glasses (solids that exist in a vitreous disordered state), atoms may also be held together by chemical bonds without presence of any definable molecule, but also without any of the regularity of repeating units that characterizes crystals.
Usage examples of "molecule".
Slight imperfections in the match were negotiated by a jostling crowd of donor or acceptor molecules.
But when the atoms come under the influence of the higher-level morphogenetic field of a molecule, these probabilities are modified in such a way that the probability of events leading toward the actualization of the final form are enhanced, while the probability of other events is diminished.
Virtually all the food and oxygen you take into your body are delivered, after processing, to the mitochondria, where they are converted into a molecule called adenosine triphosphate, or ATP.
Though burdened by the giant molecules, his sympathetic nervous system and adrenal glands, which were particularly affected in others, were quite indifferent to the asps.
They lie here trapped in glass, little two-carbon aliphatic molecules that can drown regret, banish fear, and ease the ache of conscience.
The molecule of estrone, for instance, differs from that of androsterone only in the presence of three double bonds and in the absence of carbon-ig.
But if the relation of liquids to their vapors be that here shadowed forth, if in both cases the molecule asserts itself to be the dominant factor, then the dispersion of the water of our seas and rivers, as invisible aqueous vapor in our atmosphere, does not annul the action of the molecules on solar and terrestrial heat.
These crystals were analyzed and it was reported that within each secretin molecule there existed 3 lysines, 2 arginines, 2 prolines, i histi-dine, i glutamic acid, i aspartic acid, and i methionine.
We link the astatine isotope to carrier molecules that seek out the disseminated microscopic cancers in your brain.
Inhaled sodium azide goes into the lungs and directly into the blood, where its molecules bond with oxygen molecules and render the oxygen unusable.
Ever since the first dab of living substance was brewed up in the amino-acid-tainted soups of azoic oceans on our primordial Earth, and the first simple prototypes of the double-helix DNA molecules of heredity appeared, biological forms have been becoming more complex--learning, acquiring more know-how.
Bit by bit, loosened molecule by loosened molecule, in accordance with the patient, relentless laws of chemistry, the sinew slowly dissolved, weakening the bond which held the compressed, contorted, sharpened baleen, until the slender bond broke.
Apparently the molecule caused a very complex cascade effect, in which the release of certain biogenic amines caused the release of other chemicals, and so on.
Plus we need to get the molecule from Bowden and put that in the same escrow.
The chloroplasts of a plant cell-small green particles containing chlorophyll-absorb the energy of sunlight to split water molecules into hydrogen and oxygen atoms.