[math-fun] What is a "k-vector"?

On the GA list http://groups.google.com/group/geometric_algebra/ I recently claimed that the term "k-vector" (as in 2-vector, 3-vector) routinely denotes a vector with dimension k. This was subsequently queried, whereupon I was obliged to admit my inability to quote any actual example from the literature. Can anybody clarify the situation --- or better still, provide some relevant citations? Fred Lunnon