from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A colorless flammable liquid, CH3OCH2OCH3, used as a solvent and in the manufacture of perfumes, adhesives, and protective coatings.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Dimethoxymethane.

from the GNU version of the Collaborative International Dictionary of English

  • n. A light, volatile liquid, H2C(OCH3)2, regarded as a complex ether, and having a pleasant ethereal odor. It is obtained by the partial oxidation of methyl alcohol. Called also formal.

from The Century Dictionary and Cyclopedia

  • n. Methylene dimethyl ether, CH2(OCH3)2, a liquid product of the oxidation of methylic alcohol. It has a pleasant odor, and by oxidation passes into formic acid.


methyl + -al3.
(American Heritage® Dictionary of the English Language, Fourth Edition)
methyl +‎ -al (Wiktionary)


  • In addition to formaldehyde, paraformaldehyde, trioxymethylene, methylal, hexamethylene-tetramine, and other substances containing a reactive methylene group, as well as acetaldehyde, benzaldehyde and other aldehydes may be employed to induce reaction.

    Synthetic Tannins

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