methylene
noun
meth·y·lene ˈme-thə-ˌlēn 
-lən
: a divalent hydrocarbon group CH2 derived from methane
Example Sentences
Recent Examples on the Web There’s benzene, methylene, and aromatic hydrocarbons, carcinogenic. 
Lindsey Bartlett, Forbes, 28 Apr. 2021 Covestro also manufacturers the more technically-challenging methylene diphenyl diisocyanate, or MDI, used to make polyurethanes for insulation. Andrew Marc Noel, Bloomberg.com, 17 Sep. 2020
Lindsey Bartlett, Forbes, 28 Apr. 2021 Covestro also manufacturers the more technically-challenging methylene diphenyl diisocyanate, or MDI, used to make polyurethanes for insulation. Andrew Marc Noel, Bloomberg.com, 17 Sep. 2020 Word History
Etymology
French méthylène, from Greek methy wine + hylē wood — more at mead
First Known Use
1835, in the meaning defined above
Phrases Containing methylene
Medical Definition
methylene
noun
meth·y·lene ˈmeth-ə-ˌlēn -lən
-lən : a bivalent hydrocarbon radical CH2 derived from methane by removal of two hydrogen atoms