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 of single bonds.
  • noun organic chemistry The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine.
  • 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

[French méthylène : Greek methu, wine; see medhu- in Indo-European roots + Greek hūlē, wood, substance.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

French méthylène, from Ancient Greek μέθυ (methy, "wine") + ὕλη (hylē, "wood").

Support

Help support Wordnik (and make this page ad-free) by adopting the word methylene.

Examples

  • For example, methylene is linear in its ground state but bent in states of higher energy.

    Nobel Prize in Chemistry 1971 - Presentation Speech 1972

  • "It appears they were boiling a chemical called methylene chloride as they normally do as part of their process," he said.

    Blog updates 2009

  • "surfactants" called methylene blue active substances in her well water and her pond.

    The Altoona Mirror 2010

  • "surfactants" called methylene blue active substances in her well water and her pond.

    The Altoona Mirror 2010

  • The protoplasm also contains peculiar angular granules, which stain deeply with basic dyes, such as methylene blue; these are known as Nissl’s granules (Fig. 626).

    IX. Neurology. 1. Structure of the Nervous System 1918

  • 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

  • There are the old standard gel strippers containing caustic solvents such as methylene chloride and methyl ethyl ketone.

    www.philadelphiaweekly.com Philadelphia Weekly 2010

  • Typical decaffeinated coffees are processed using toxic organic solvents such as methylene chloride and ethyl acetate.

    MyLinkVault Newest Links 2009

  • Compared to thermal or paint stripping, the chemical process is considerably faster and protects the user from harmful chemicals such as methylene chloride.

    Manufacturingtalk - manufacturing industry news 2009

  • 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

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.