Azulene
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 A bicyclic aromatic hydrocarbon containing a five- and a seven-membered fused ring; it is a blue, oily liquid first obtained from the essential oil of wormwood. uncountable
- 2 Any of its derivatives. countable
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.