Boyd’s Bible Dictionary:
The arm of Gulf of Aden which separates Egypt from Arabia
“The sea” (Ex. 14:2,9,16,21,28; 15:1-19; Josh. 24:6-7). “Egyptian sea” (Isa. 11:15). “Sea of Suph,” weedy or reedy sea, translated “Red Sea” (Ex. 10:19; 13:18; 15:4; 23:31; Num. 21:4). In N. T., the Greek “Erythrean,” or Red Sea (Acts 7:36). At its head it separates into gulfs of Akaba and Suez, the latter of which the Israelites crossed.
Strong’s Dictionary of Greek Words:
Transliteration:
eruthros
Meaning:
of uncertain affinity; red, i.e. (with 2281) the Red Sea