A substructure that imparts characteristic chemical behaviors to a molecule, for example, a carboxylic acid group.
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http://antoine.frostburg.edu/chem/senese/101/glossary/f.shtml
In organic chemistry, functional groups are specific groups of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules. The same functional group will undergo the same or similar chemical reaction(s) regardless of the size of the molecule it is a part of. However, its relative reactivity ca...
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http://en.wikipedia.org/wiki/Functional_group
[ecology] In ecology, functional groups are collections of organisms based on morphological, physiological, behavioral, biochemical, environmental responses or on trophic criteria. In ocean biogeochemical modelling, the following four criteria have been proposed: ...
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http://en.wikipedia.org/wiki/Functional_group_(ecology)
any of numerous combinations of atoms that form parts of chemical molecules, that undergo characteristic reactions themselves, and that in many ... [4 related articles]
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http://www.britannica.com/eb/a-z/f/70
Organic compounds are thought of as consisting of a relatively unreactive backbone, for example a chain of sp
3 hybridized carbon atoms, and one or several functional groups. The functional group is an atom, or a group of atoms that have similar chemical properties whenever it occurs in different compounds. It defines the characteristic p...
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http://www.chem.qmul.ac.uk/iupac/gtpoc/FG.html
A group of atoms that represents a potential reaction site in an organic compound.
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http://www.chemistry-dictionary.com/definition/functional+group.php
A group of atoms responsible for the characteristic reactions of a compound. For example, the hydroxyl group is the functional group of alcohols. In amino acids, two functional groups – an amino group and a carboxyl group – are attached to the same carbon atom. The properties of a molecu...
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http://www.daviddarling.info/encyclopedia/F/functional_group.html
a predetermined set of functions that may be performed by one or more equipments
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An atom or group of atoms that has similar chemical behavior, no matter what the rest of the molecule looks like. For example, the hydroxy (OH) group in all alcohols has similar reactivity, as does the thio (SH) group in all thiols.
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http://www.encyclo.co.uk/local/20046
A group of atoms that represents a potential reaction site in an organic compound.
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http://www.encyclo.co.uk/local/20728
1. <chemistry> The specific atom that give a biomolecule a specific chemical characteristic. ... 2. <ecology> This ecological term refers to groups of organisms that obtain energy in similar ways. Autotrophic plants fix energy from sunlight. Fungi and bacteria decompose organic matter. Shredders chew large particles like tree leaves. Sc...
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A group of species that are assumed in a model to function in a similar fashion by having the same parameter values for process equations. These are lumped together in the model as a single entity.
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In organic chemistry, a specific structure of one or more atoms that is responsible for the chemical behaviour of a substance
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Type: Term See: function4
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http://www.medilexicon.com/medicaldictionary.php?t=38629
In chemistry, a small number of atoms in an arrangement that determines the chemical properties of the group and of the molecule to which it is attached (for example, the carboxyl group COOH, or the amine group NH
2). Organic compounds can be considered as structural skeletons, with a high carbon content, with functional group...
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https://www.encyclo.co.uk/local/21221
a group of atoms responsible for the characteristic behavior of the class of compounds in which the group occurs, as the hydroxyl group in alcohols.
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https://www.infoplease.com/dictionary/functional-group
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