Definition of tetracycline in English:


Syllabification: tet·ra·cy·cline
Pronunciation: /ˌtetrəˈsīˌklēn, -klin


  • Any of a large group of antibiotics with a molecular structure containing four rings.
    • These antibiotics are often obtained from bacteria of the genus Streptomyces
    More example sentences
    • This strain was resistant to methicillin, cephalothin, gentamicin, erythromycin, chloramphenicol and tetracycline.
    • Moderate acne is often successfully treated with a low-dose oral antibiotic, such as tetracycline or erythromycin.
    • He was treated with a six-month course of a tetracycline and made a slow and steady recovery.


1950s: from tetra- + cyclic + -ine4.

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