Seneca, Lucius Annaeus. Born about 4 B.C. Stoic philosopher. Was banished from Rome on a false charge but, returning after eight years, became tutor to Nero. Being accused of conspiracy, he died in 65 A.D., by opening his veins and suffocating himself in a warm bath. His works consist of treatises and letters, but the tragedies ascribed to him are of doubtful authenticity.