skew lines
http://wiki.answers.com/Q/What_are_two_lines_that_...

Parallel Lines are lines that never
http://www.chacha.com/question/whataretwolines...

Intersecting lines. The opposite of skew lines.
http://answers.yahoo.com/question/index?qid=201308...

If the two lines intersect, then they have a point in common. In other words, there exists a point on the plane that is in the solution set for the equations of both lines. Algebraically
http://au.answers.yahoo.com/question/index?qid=201...
