Red Sea

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an arm of the Indian Ocean, extending northwest between Africa and Arabia: connected to the Mediterranean by the Suez Canal. 1,450 miles (2,335 kilometers) long; 170,000 square miles (440,300 square kilometers); greatest depth, 7,254 feet (2,211 meters).
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Origin of Red Sea

Translation of Latin Mare Rubrum, from Greek Erythrà Thálassa “Red Sea,” a translation of Hebrew Yam Sūph “Sea of Reeds.” The reason for Erythrà (Thálassa) is unknown; perhaps Erythrà refers to seasonal blooms of red algae on the on the surface of the water, or to ancient associations of “red” with “south,” (as “black” with “north,” as in “Black Sea”)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use Red Sea in a sentence

British Dictionary definitions for Red Sea

Red Sea

a long narrow sea between Arabia and NE Africa, linked with the Mediterranean in the north by the Suez Canal and with the Indian Ocean in the south: occasionally reddish in appearance through algae. Area: 438 000 sq km (169 000 sq miles)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for Red Sea

Red Sea

Narrow sea between Africa and the Arabian Peninsula.

notes for Red Sea

Probably named for the red algae that are sometimes present in its waters.

notes for Red Sea

According to the Bible (see also Bible), the Red Sea's waters parted to allow the Israelites, led by Moses, to escape the pursuing Egyptian army. The “Red Sea” of the biblical account, however, seems more likely to have been the marshy Sea of Reeds than the present-day Red Sea.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.