Etymology
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Sinai

the mountain is perhaps named for Sin, a moon goddess worshipped by Sumerians, Akkadians, and ancient Arabs. As an adjectival form, Sinaic (1769), Sinaitic (1786).

updated on October 10, 2017

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Definitions of Sinai from WordNet

Sinai (n.)
a mountain peak in the southern Sinai Peninsula (7,500 feet high); it is believed to be the peak on which Moses received the Ten Commandments;
Synonyms: Mount Sinai
Sinai (n.)
a desert on the Sinai Peninsula in northeastern Egypt;
Synonyms: Sinai Desert
Sinai (n.)
a peninsula in northeastern Egypt; at north end of Red Sea;
Synonyms: Sinai Peninsula
From wordnet.princeton.edu, not affiliated with etymonline.