proper nounThalliTHALLI☆ KeepMeaninga people on the Caspian SeaLewis & Short 1879ModernAs printed, 1879THALLILEWIS & SHORTTHALLIThalli, ōrum, m., I. a people on the Caspian Sea, Plin. 6, 5, 5, § 17.Read the whole entry