A geographical area of fertile land in the Middle East stretching in a broad semicircle from the Nile to the Tigris and Euphrates WordNet 3.0 & Open English WordNet

The Fertile Crescent is a crescent-shaped region in the Middle East, spanning modern-day Iraq, Syria, Lebanon, Israel, Palestine and Jordan, together with the northern region of Kuwait, the southeastern region of Turkey and the western portion of Iran. Wikipedia

A region comprising areas currently part of Iraq, Kuwait, Syria, Lebanon, Jordan, Israel, Cyprus, Egypt, Turkey and Iran Wikipedia Disambiguation

Crescent-shaped geographic region of the Middle-East, containing the moist and fertile land of Western Asia, and the Nile Valley and Nile Delta of northeast Africa Wikidata

A crescent-shaped strip of fertile land stretching from present-day Iraq through eastern Turkey and down the Syrian and Israeli coasts. Wiktionary

Crescent-shaped arc of fertile land. Wiktionary (translation)