tetracyclines

/T EH0 T R AH0 S AY0 K L AY1 N Z/
noun
  1. 1

    An antibiotic produced by the Streptomyces bacterium.

  2. 2

    Any antibiotic with the same general structure derived from tetracene with many hydroxyl and other groups.

Source: https://en.wiktionary.org/wiki/tetracycline, https://en.wiktionary.org/wiki/tetracyclines