erythromycin

 
Pronunciation: /ɪˌrɪθrə(ʊ)ˈmʌɪsɪn/

noun

[mass noun] Medicine
  • an antibiotic used in the treatment of infections caused by Gram-positive bacteria. It is similar in its effects to penicillin.
    • This is obtained from the streptomycete bacterium Streptomyces erythreus

Origin:

1950s: from elements of the modern Latin taxonomic name (see above) + -in1