Definition of tetracyclic in English:


Line breaks: tetra|cyc¦lic
Pronunciation: /ˌtɛtrəˈsʌɪklɪk
, -ˈsɪk-/


  • (Of a compound) having a molecular structure of four fused hydrocarbon rings.
    More example sentences
    • Cucurbitacins are oxygenated tetracyclic triterpenes that have been shown to have emetic, antineoplastic, and cytotoxic effects on herbivores, resulting in feeding and oviposition deterrence and reduced growth of consumers.
    • A 1998 study showed that pentacyclic alkaloids weakly activated human B- and T-lymphocytes, and that tetracyclic oxindole alkaloids reduced the activity of pentacyclic oxindoles.
    • Mirtazapine is a tetracyclic antidepressant unrelated to tricyclic antidepressants and SSRIs.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
elaborate ornamentation of a vocal melody