The story
From chlor- + tetracycline.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A yellow crystalline broad-spectrum antibiotic C₂₂H₂₃ClN₂O₈ (trademark Aureomycin) of the tetracycline group that is produced by a soil actinomycete (Kitasatospora aureofaciens), active against many bacterial and fungal infections, and is sometimes used in animal feeds to stimulate growth. Full definition →
From chlor- + tetracycline.
Etymology from Wiktionary, CC BY-SA 4.0.