Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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noun
The divalent group –CH2– in which the free valencies are part of single bonds.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
The unstable carbene :CH2
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
the bivalent radical CH2 derived from methane
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: methylene group, methylene radical
Antonyms: none provided
Broader terms: group, radical, chemical group
History
French méthylène, from Ancient Greek μέθυ (méthu, “wine”) + ὕλη (húlē, “wood”). By surface analysis, meth- + -ylene.
Across languages
17 source translations are retained for this English entry.
