Tihamah, Tihama, or Tehamaall: tĭhä´mə [key], narrow, extremely arid lowland region along the west coast of the Arabian peninsula, extending c.1,300 mi (2,090 km) from the Gulf of Aqaba S to the Bab el Mandeb straits. Some agriculture is practiced on oases, and several deep inlets, called sharms, provide excellent anchorages along the coast.
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