Frog: a well-known amphibious animal of the genus Rana . The mention of this reptile in the Old Testament is confined to the passage in (Exodus 8:2-7) etc., in which the plague of frogs is described, and to (Psalms 78:45; 105:30) In the New Testament the word occurs once only, in (Revelation 16:13) There is no question as to the animal meant. The only known species of frog which occurs at present in Egypt is the Rana esculenta , the edible frog of the continent.