Pronunciation: (tu-wän'tu-pek"; Sp. te-wän"te-pek'), [key]
1. Isthmus of, an isthmus in S Mexico, between the Gulf of Tehuantepec and the Gulf of Campeche. 125 mi. (200 km) wide at its narrowest point.
2. Gulf of, an inlet of the Pacific, off the S coast of Mexico. ab. 300 mi. (485 km) wide.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.