Pe•cosPronunciation: (pā'kus, -kōs), [key]
a river flowing SE from N New Mexico through W Texas to the Rio Grande. 735 mi. (1183 km) long.
a town in W Texas, near the Pecos River. 12,855.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.