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.
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No pronunciation record was provided for this word.
noun
Any compound having five carbon-carbon double bonds
Definition source: English Wiktionary via Wiktextract
Usage: especially, in-compounds
Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
An intermediate (unreduced) product in Torgov steroid synthesis
Definition source: English Wiktionary via Wiktextract
Qualifier: steroid chemistry
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From penta- + -ene.
