adverb - One of the two directions pointing out of realmspace into tetraspace; movement in the positive w direction. In tetraspace, represented by the vector 0,0,0,1. This term refers to the direction analogous to up; the 'u' in 'upsilon' corresponds to the 'u' in 'up'. In some literature, this direction is referred to as kata. This term is the same direction as wint, but is used in a different context: upsilon is movement from realmspace to tetraspace, but wint is a turning direction. The opposite direction is delta. See the chart under direction.