Standard Lemma guide

hydroxymethylidene

noun · 1 senses · updated from the 2026-07-25 local source snapshot

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

Pronunciation

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1

noun

Meaning 1

A chemical group or moiety where a carbon atom is double-bonded to a methylene group that also holds a hydroxyl group.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Hellenic *údōr Ancient Greek ῡ̆̔́δωρ (hū̆́dōr) Ancient Greek ὑδρο- (hudro-)lbor. French hydro- Proto-Indo-European *ǵenh1- Proto-Indo-European *-os Proto-Indo-European *ǵénh1os Proto-Hellenic *génos Ancient Greek γένος (génos) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -γενής (-genḗs)lbor. French -gène French hydrogènebor. English hydrogen Proto-Indo-European *h2eḱ-der.? Ancient Greek ὀξύς (oxús) ▲ Ancient Greek γένος (génos) French oxygènebor. English oxygen Proto-Indo-European *swel-der.? Ancient Greek ῡ̔́λη (hū́lē)der. Frenchder. English -yl blend English hydroxyl English hydroxy- English methylidene English hydroxymethylidene From hydroxy- + methylidene.