Definition of tetracyclic in English:


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


(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.


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

Definition of tetracyclic in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day noisome
Pronunciation: ˈnɔɪs(ə)m
having an extremely offensive smell