Easton's Bible Dictionary (1897)/Bush
Bush : In which Jehovah appeared to Moses in the wilderness (Ex. 3:2; Acts 7:30). It is difficult to say what particular kind of plant or bush is here meant. Probably it was the mimosa or acacia. The words "in the bush" in Mark 12:26; Luke 20:37, mean "in the passage or paragraph on the bush;" i.e., in Ex. 3.