chemical group
1
3.5
- noun
- /ˈkɛmɪkəl ɡruːp/
- Specialized
:
grupo químico
- The test seeks to target a biochemical change called DNA methylation, "which occurs when a chemical group called methyl attaches itself to cytosine, one of the four nucleotides or base building blocks of DNA" (Science and Children, 2009, p. 9).
Examples
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In either case, the part of the molecule farthest from the nanotube contains a chemical group that disperses in the resin.
Academic text (2010) -
But you can tell from where these free chemical groups are which amino acid was added first and which was added last.
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A chemical group develops the reagents.
Academic text (2003) -
Only one of the schools used the preferred method of storing chemicals according to chemical groups.
Academic text (2004) -
For example, it appears that one of the chemical groups in Echinacea, alkylamides, may activate the cannabinoid 2 receptor.
Blog text (20) -
In organic chemistry, a chemical group can determine the reactivity of a molecule.
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The chemical groups in this compound play a crucial role in its biological activity.
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Different chemical groups attached to the carbon backbone can affect the substance's properties.
Synonyms
35
6.0
Two or more atoms bonded together and acting as one part of a molecule
9
8.1
A group of atoms that reacts quickly with other molecules
1
7.7
A chemical group made of two methyl groups attached to a molecule
1
5.3
A small group of atoms in a molecule with one carbon and three hydrogen atoms
1
6.8
A group of atoms with a carbon atom double-bonded to an oxygen atom
A small part of a molecule made of two carbon atoms and five hydrogen atoms
A small part of a chemical made of one carbon and two hydrogen atoms that links two parts
A part of a molecule with an oxygen and hydrogen joined to a carbon atom
A group of atoms with an oxygen atom joined to a small carbon chain
A small chemical group with an oxygen atom bonded to a methyl group
A part of a molecule where carbon joins oxygen by a double bond, found in aldehydes and ketones
A carbon joined to an oxygen by a double bond and to two other carbons
A chemical group in a molecule with a carbon bonded to hydrogen and double-bonded to oxygen
A small part of a molecule with one carbon joined to one nitrogen by three bonds written −CN
A chemical part with two nitrogen atoms linked by a double bond and joined to two carbon chains
A short chemical part that joins two molecules and gives them space
Surface Forms
Morphology
The meaning is directly derivable from 'chemical' (relating to chemistry) plus 'group' (a collection or unit): together they naturally denote a grouped unit in chemistry. This adjective+noun composition is transparent and parallels equivalents in many languages, so a B1 learner who knows both constituents would likely infer the MWE meaning.
Etymology
Chemical group paints a picture of a small group of atoms joined together like a tiny team attached to a larger molecule, as if the atoms are 'holding hands' and acting as one piece. That's why it means 'two or more atoms bonded together as a unit' in chemistry.