Merriam-Webster Collegiate Dictionary - pita

 I. noun  Etymology: Spanish & Portuguese  Date: 1698  1. any of several fiber-yielding plants (as an agave)  2. the fiber of a ~; also any of several fibers from other sources  II. noun  Etymology: Modern Greek  Date: 1945 a thin flat bread that can be separated easily into two layers to form a pocket — called also ~ bread