HERMAGORAS, of Temnos, Greek rhetorician of the Rho dian school and teacher of oratory in Rome, flourished during the first half of the I st century B.C. He founded a special school, the members of which called themselves Hermagorei. His chief opponent was Poseidonius of Rhodes (Plutarch, Pompey 42). According to Suidas and Strabo, he was the author of rhetorical manuals and of other works, which should perhaps be attributed to his younger namesake, surnamed Carion, the pupil of Theo dorus of Gadara.