Rubʿ al Khali
[ Arabic roo b ahl khah-lee; English roo b al kah-lee ]
/ Arabic ˌrʊb ɑl ˈxɑ li; English ˌrʊb æl ˈkɑ li /
noun
a desert in S Arabia, N of Hadhramaut and extending from Yemen to Oman. About 250,000 sq. mi. (647,500 sq. km).