The story
Blend of rifam(y)cin + pi(perazinyl).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A reddish-brown semisynthetic antibiotic C₄₃H₅₈N₄O₁₂ obtained from the bacterium Amycolaptosis mediterranei, used chiefly to treat tuberculosis, leprosy, and asymptomatic carriers of meningococci. Full definition →
Blend of rifam(y)cin + pi(perazinyl).
Etymology from Wiktionary, CC BY-SA 4.0.