methylene

American  

[meth-uh-leen] / ˈmɛθ əˌlin /

adjective

Chemistry.

1. containing the methylene group.

---

methylene British  

/ ˈmɛθɪˌliːn /

noun

1. (modifier) of, consisting of, or containing the divalent group of atoms =CH 2

   a methylene group or radical

---

methylene Scientific  

/ mĕth′ə-lēn′ /

1. A bivalent hydrocarbon radical, CH ₂. Because it has two unshared electrons, it is extremely reactive and occurs only as an intermediate byproduct in chemical reactions. Methylene is a component of unsaturated hydrocarbons.

---

Etymology

Origin of methylene

< French méthylène (coined in 1834), equivalent to Greek méth ( y ) wine ( mead ¹ ) + hýl ( ē ) wood + French -ène -ene, taken to mean “wood-spirits” ( vin ou liqueur spiritueuse du bois ), though elements of the compound are in the wrong order to give this sense

Example Sentences

But the results lined up with recent findings showing possible links between autism and exposure to metals and certain solvents during pregnancy or early childhood, including a solvent called methylene chloride.

From Salon

Ethyl acetate and methylene chloride are two common solvents used to extract caffeine from green coffee beans.

From Salon

The rule banning methylene chloride is the second risk management rule to be finalized by President Joe Biden’s administration under landmark 2016 amendments to the Toxic Substances Control Act.

From Seattle Times

In a 2-year animal inhalation study sponsored by the National Toxicology Program, methylene chloride produced a significant increase in benign and malignant tumors of the lung and liver of male and female mice.

From Salon

The toy consists of two glass bulbs connected by a glass tube with a highly volatile liquid, methylene chloride, stored within.

From Science Daily