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methylene

methylene

3 9.7
A small group in many organic molecules made of one carbon bonded to two hydrogen atoms
  • noun
  • /ˈmɛθəˌliːn/
  • Specialized
translation icon : metileno
  • Bone scanning with 99m Tc methylene diphosphonate is exquisitely sensitive because the radiotracer accumulates at sites of osteoblastic activity.
  • methylene chloride
  • methylene blue
  • methylene-blue agar

You can Fact Check me like uncle Uncle Jack type in methylene blue and red light therapy.

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Examples

  • Standard staining of blood samples with methylene blue, eosin, and azure cannot reveal bacteria in erythrocytes.

    Academic text (2017)
  • Standard staining of blood samples with methylene blue, eosin, and azure cannot reveal bacteria in erythrocytes.

  • At first I cut off a small bit and put this into methylene chloride.

  • The ovarian tissue was treated with several drops of methylene blue solution, then flushed with water.

    Academic text (1990)
  • Treatment for methemoglobinemia is 1 to 2 mg/kg of intravenous methylene blue.

    Academic text (2004)
  • The ovarian tissue was treated with several drops of methylene blue solution, then flushed with water.

  • Treatment for methemoglobinemia is 1 to 2 mg/kg of intravenous methylene blue.

Synonyms

methylene radical
vsmethylene
  • Specialized
9.0

A very reactive group of one carbon and two hydrogen atoms that exists briefly in chemical reactions

is seen widely inside organic molecules rather than only noted for extreme reactivity
methylene group
vsmethylene
  • Specialized
5.8

A small part of a chemical made of one carbon and two hydrogen atoms that links two parts

is the reactive form rather than a stable linking unit in molecules

Compounds

methylene blue
  • Specialized
1 6.4

A dark green dye used to stain cells, act as an antiseptic, and treat cyanide poisoning

methylene chloride
  • Specialized
1 7.5

A colorless liquid with a strong smell used to remove paint and clean equipment

methylene group
  • Specialized
5.8

A small part of a chemical made of one carbon and two hydrogen atoms that links two parts

methylene radical
  • Specialized
9.0

A very reactive group of one carbon and two hydrogen atoms that exists briefly in chemical reactions

Surface Forms

methylene singular
methylenes plural

Morphology

methylene = methyl (opaque) = meth + ylene

This is a specialized chemical combining form; the specific meaning 'a bivalent CH2 radical' requires chemistry knowledge and is not derivable by an average B1 learner from 'meth-' or 'methyl'.

Etymology

Methylene comes from methane, the simple gas, with the chemical ending -ylene that chemists use to mean a small 'part' of a molecule. So methylene names the CH₂ 'group' with 'two hydrogens', which is why it often acts as a link in many organic compounds.