|Noah Webster's Dictionary|
(n.) The hinder part, posteriors, or rump of a person or animal.
Int. Standard Bible Encyclopedia
bak'sid': See BACK.
Backside (3 Occurrences)
Revelation 5:1 And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals. (KJV WBS)
Exodus 3:1 Now Moses kept the flock of Jethro his father in law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb. (KJV WBS)
Exodus 26:12 And the remnant that remaineth of the curtains of the tent, the half curtain that remaineth, shall hang over the backside of the tabernacle. (KJV WBS)