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Pronunciation (US): 

 Dictionary entry overview: What does chemical change mean? 

  The noun CHEMICAL CHANGE has 1 sense:

1. (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

  Familiarity information: CHEMICAL CHANGE used as a noun is very rare.

 Dictionary entry details 


Sense 1chemical change [BACK TO TOP]


(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

Classified under:

Nouns denoting natural processes


chemical action; chemical change; chemical process

Hypernyms ("chemical change" is a kind of...):

action; activity; natural action; natural process (a process existing in or produced by nature (rather than by the intent of human beings))

Domain category:

chemical science; chemistry (the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions)

Hyponyms (each of the following is a kind of "chemical change"):

ferment; fermentation; fermenting; zymolysis; zymosis (a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol)

peptisation; peptization (the process of converting to a sol; bringing to a colloidal solution)

nitrification (the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound))

chemical mechanism; mechanism (the atomic process that occurs during a chemical reaction)

iodination (the substitution or addition of iodine atoms in organic compounds)

inversion (a chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa)

intumescence; intumescency; swelling (the swelling of certain substances when they are heated (often accompanied by release of water))

hydrogenation (a chemical process that adds hydrogen atoms to an unsaturated oil)

gassing (the process of interacting with gas)

photosynthesis (synthesis of compounds with the aid of radiant energy (especially in plants))

polymerisation; polymerization (a chemical process that combines several monomers to form a polymer or polymeric compound)

transamination (the process of transposing an amino group within a chemical compound)

transamination (the process of transfering an amino group from one compound to another)

synthesis (the process of producing a chemical compound (usually by the union of simpler chemical compounds))

synaeresis; syneresis (the separation of liquid from a gel that is caused by contraction (as in cheese making))

sequestration (the action of forming a chelate or other stable compound with an ion or atom or molecule so that it is no longer available for reactions)

pyrochemical process; pyrochemistry (processes for chemical reactions at high temperatures)

proteolysis (the hydrolysis of proteins into peptides and amino acids by cleavage of their peptide bonds)

precipitation (the process of forming a chemical precipitate)

gasification (the process of changing into gas)

dissociation ((chemistry) the temporary or reversible process in which a molecule or ion is broken down into smaller molecules or ions)

digestion (the process of decomposing organic matter (as in sewage) by bacteria or by chemical action or heat)

chemical reaction; reaction ((chemistry) a process in which one or more substances are changed into others)

chelation (the process of forming a ring by forming one or more hydrogen bonds)

catalysis; contact action (acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction)

calcification (a process that impregnates something with calcium (or calcium salts))

blueing; bluing (a process that makes something blue (or bluish))

association ((chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding)

amylolysis (conversion of starch to sugar)

agglutinating activity; agglutination (the coalescing of small particles that are suspended in solution; these larger masses are then (usually) precipitated)

chlorination (the addition or substitution of chlorine in organic compounds)

cleavage (the breaking of a chemical bond in a molecule resulting in smaller molecules)

desalination; desalinisation; desalinization (the removal of salt (especially from sea water))

demineralisation; demineralization (the removal of minerals and mineral salts from a liquid (especially from water))

de-iodination (the removal of iodine atoms from organic compounds)

decarboxylation (the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen))

decalcification (loss of calcium from bones or teeth)

deamination; deaminization (removal of the amino radical from an amino acid or other amino compound)

cracking (the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process))

corroding; corrosion; erosion (erosion by chemical action)

acylation (the process of introducing an acyl group into a compound)

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