(anc. Teanum), a town of Naples, province of Terra di Lavoro, 13 miles N.W. of Capua, on the S.E. side of an extinct volcano called Rocca Monfina. It has narrow streets, a cathedral, several other churches and convents, a diocesan seminary, almshouses, the remains of a Roman theatre and amphitheatre, and of a very large medieval castle. Some trade in corn and oil is carried on. The ancient Teanum was the capital of the Sidicini, and with the other possessions of that people it fell into the hands of the Romans about 300 B.C. In the vicinity there are mineral-springs. Pop. 7800.