Molecule
['mɒlɪkjuːl] or ['mɑlɪkjul]
Definition
(noun.) (physics and chemistry) the simplest structural unit of an element or compound.
Edited by Brent--From WordNet
Definition
(n.) One of the very small invisible particles of which all matter is supposed to consist.
(n.) 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.
(n.) 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.
Typed by Irwin
Synonyms and Synonymous
n. [1]. Atom, ultimate particle (of an element), indivisible particle.[2]. Group of atoms (in a compound body), cluster of atoms.
Typed by Connie
Synonyms and Antonyms
SYN:Atom, monad
ANT:Body, bulk, organism, compound, structure
Typed by Jolin
Definition
n. one of the minute particles of which matter is composed: the smallest mass of any substance which retains the properties of that substance.—adj. Molec′ular belonging to or consisting of molecules.—n. Molecular′ity.—Molecular attraction attraction acting on the atoms or molecules of a body as distinguished from attraction of gravitation.
Inputed by Betty
Unserious Contents or Definition
n. The ultimate indivisible unit of matter. It is distinguished from the corpuscle also the ultimate indivisible unit of matter by a closer resemblance to the atom also the ultimate indivisible unit of matter. Three great scientific theories of the structure of the universe are the molecular the corpuscular and the atomic. A fourth affirms with Haeckel the condensation of precipitation of matter from ether—whose existence is proved by the condensation of precipitation. The present trend of scientific thought is toward the theory of ions. The ion differs from the molecule the corpuscle and the atom in that it is an ion. A fifth theory is held by idiots but it is doubtful if they know any more about the matter than the others.
Checker: Tessie
Examples
- Two atoms of the element hydrogen unite with one atom of the element oxygen to make one molecule of water. Bertha M. Clark. General Science.
- What is it that makes a molecule of water differ from a molecule of vinegar, and each differ from all other molecules? Bertha M. Clark. General Science.
- A group of symbols, such as this, expressing a molecule of a compound is called a _formula_. Bertha M. Clark. General Science.
- A molecule of water is made up of three atoms. Various. The Wonder Book of Knowledge.
- For example, the molecule of water has two different atoms, the oxygen atom and the hydrogen atoms; alcohol has three different kinds of atoms, oxygen, hydrogen, and carbon. Bertha M. Clark. General Science.
- When the two volumes combine with one, the combina tion does not take place, as Dalton had supposed, atom for atom, but each half-mol ecule of oxygen combines with one molecule of hydrogen. Walter Libby. An Introduction to the History of Science.
- When the atoms comprising a molecule are all alike, the substance is called an element, and is said to be a simple substance. Bertha M. Clark. General Science.
- And yet molecules are made up of even smaller particles, called atoms. Various. The Wonder Book of Knowledge.
- Even the log of wood which lies heavy and motionless on our woodpile is made up of countless billions of molecules each in rapid incessant motion. Bertha M. Clark. General Science.
- The molecules of solid bodies cannot escape so readily as those of liquids and gases, and do not travel far. Bertha M. Clark. General Science.
- In the case of the cologne, some molecules must have escaped from the liquid by the process of evaporation and traveled through the air to the nose. Bertha M. Clark. General Science.
- Because the ferments of that fermentation feed more easily on the right hand than on the left hand molecules. Walter Libby. An Introduction to the History of Science.
- How Large are Molecules? Various. The Wonder Book of Knowledge.
- What is it that makes a molecule of water differ from a molecule of vinegar, and each differ from all other molecules? Bertha M. Clark. General Science.
- Learned men tell us that all hot bodies and all luminous bodies are composed of tiny particles, called molecules, which move unceasingly back and forth with great speed. Bertha M. Clark. General Science.
- Freezing water into ice is caused by making the molecules, and, in turn, the atoms, stick to each other. Various. The Wonder Book of Knowledge.
- One volume of hydrogen has the same nu mber of molecules as one volume of oxygen. Walter Libby. An Introduction to the History of Science.
- This great physicist had prov ed t hat cathode rays are composed not of negatively charged molecules, as had been supposed, but of much smaller particles or corp uscles. Walter Libby. An Introduction to the History of Science.
- That gives us about as clear an idea as it is possible to get of the size of molecules. Various. The Wonder Book of Knowledge.
- Now there are but seventy or eighty different kinds of atoms, and hence there can be but seventy or eighty different substances whose molecules are composed of atoms which are alike. Bertha M. Clark. General Science.
- Sometimes, however, molecules are composed of a group of atoms all of which are alike. Bertha M. Clark. General Science.
- Generally molecules are composed of atoms which are different in kind. Bertha M. Clark. General Science.
Inputed by Andre