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单词 tetracyclic
释义

Definition of tetracyclic in English:

tetracyclic

adjective ˌtɛtrəˈsʌɪklɪkˌtɛtrəˈsɪklɪkˌtetrəˈsīklik
Chemistry
  • (of a compound) having a molecular structure of four fused hydrocarbon rings.

    Example sentencesExamples
    • 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.
    • 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.
    • Practitioners prescribing the tetracyclic antibiotics should be aware of the syndrome of increased intracranial pressure, and pay particular attention to the ocular fundus for papilloedema.
    • Maprotiline is the only tetracyclic antidepressant available in the US.

Origin

Early 20th century: from tetra- ‘four’ + Greek kuklos ‘circle’ + -ic.

 
 

Definition of tetracyclic in US English:

tetracyclic

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

    Example sentencesExamples
    • 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.
    • Practitioners prescribing the tetracyclic antibiotics should be aware of the syndrome of increased intracranial pressure, and pay particular attention to the ocular fundus for papilloedema.
    • Maprotiline is the only tetracyclic antidepressant available in the US.
    • 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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更新时间:2025/1/3 18:39:00