/meth"euh leen'/ , adj. Chem.
containing the methylene group.
[ méthylène (coined in 1834), equiv. to Gk méth ( y ) wine (see MEAD 1 ) + hýl ( e ) wood + F -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 ]