The story
From [Term?] + -citabine (“cytarabine or azacytidine derivative”).
Etymology from Wiktionary, CC BY-SA 4.0.
emtricitabine
Today it means: A synthetic nucleoside reverse-transcriptase inhibitor C₈H₁₀FN₃O₃S (trademarks Atripla, Complera, Emtriva, Stribild, Truvada) administered orally typically in conjunction with other antiretroviral agents for the treatment of HIV infection. Full definition →