Pison

Easton's Bible Dictionary (1897)

Babylonian, the current, broad-flowing, one of the “four heads” into which the river which watered the garden of Eden was divided (Gen. 2:11). Some identify it with the modern Phasis, others with the Halys, others the Jorak or Acampis, others the Jaab, the Indus, the Ganges, etc.

Smith's Bible Dictionary (1863)

[Eden]

Hitchcock's Bible Names Dictionary (1869)

changing; extension of the mouth

Public domain dictionaries.