WordReference Random House Unabridged Dictionary of American English © 2026
meth′ylene group′, [Chem.]
  1. Chemistrythe bivalent organic group >CH2, derived from methane. Also called meth′ylene rad′ical. 

'methylene group' also found in these entries (note: many are not synonyms or translations):
methylene - cyclodiene

Forum discussions with the word(s) "methylene group" in the title:


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