Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A bivalent hydrocarbon group, CH2, a component of unsaturated hydrocarbons.
from The Century Dictionary.
- noun A bivalent hydrocarbon radical (CH2) which does not exist free, but occurs in many compounds, as methylene iodide, CH2I2. Also called
methene .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A divalent hydrocarbon radical, -CH2-, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; ; -- formerly called also
methene . - noun (Chem.) an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- called also
pure blue .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry The
divalent radical CH2< in which the free valencies are part ofsingle bonds . - noun organic chemistry The same group, present as a
repeating unit , inaliphatic compounds with names such ashexamethylenediamine . - noun organic chemistry The
unstable carbene CH2:
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the bivalent radical CH2 derived from methane
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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For example, methylene is linear in its ground state but bent in states of higher energy.
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"It appears they were boiling a chemical called methylene chloride as they normally do as part of their process," he said.
Blog updates 2009
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"surfactants" called methylene blue active substances in her well water and her pond.
The Altoona Mirror 2010
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"surfactants" called methylene blue active substances in her well water and her pond.
The Altoona Mirror 2010
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The protoplasm also contains peculiar angular granules, which stain deeply with basic dyes, such as methylene blue; these are known as Nissls granules (Fig. 626).
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Tests have already shown that gold-decorated nanowires can decompose organic molecules such as methylene blue.
PhysOrg.com - latest science and technology news stories 2010
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There are the old standard gel strippers containing caustic solvents such as methylene chloride and methyl ethyl ketone.
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Typical decaffeinated coffees are processed using toxic organic solvents such as methylene chloride and ethyl acetate.
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Compared to thermal or paint stripping, the chemical process is considerably faster and protects the user from harmful chemicals such as methylene chloride.
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The Personal Care Products Council, an industry group, says formaldehyde levels in cosmetic products shouldn't exceed 0.2% and advises consumers getting their hair treated with products containing formaldehyde and methylene glycol to do so only at a well-ventilated salon.
The Taming of the Curl Anjali Athavaley 2011
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