Definition of tetracyclic in English:

tetracyclic

Syllabification: tet·ra·cy·clic
Pronunciation: /ˌtetrəˈsīklik
 
/

adjective

Chemistry
  • (Of an organic compound) having four fused rings of atoms in its molecule.
    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.

Origin

early 20th century: from tetra- 'four' + Greek kuklos 'circle' + -ic.

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