Easton’s Bible Dictionary

Flag : (Heb., or rather Egyptian, ahu, Job 8:11), rendered "meadow" in Genesis 41:2,18; probably the Cyperus esculentus, a species of rush eaten by cattle, the Nile reed. It also grows in Palestine.

In Exodus 2:3,5, Isaiah 19:6, it is the rendering of the Hebrew suph, a word which occurs frequently in connection with yam; as yam suph, to denote the "Red Sea" (which see) or the sea of weeds (as this word is rendered, Jonah 2:5). It denotes some kind of sedge or reed which grows in marshy places. (See PAPER, REED.)

Related Resources
  • Smith’s Bible Dictionary