That is Harlan Teklan. That is their terminology not necessarily the correct one.
Definition:
Inbreeding is breeding between close relatives, whether plant or animal.
Another note: Linebreeding is a form of inbreeding.
There are various websites that have definitions for inbreeding, line-breeding, outcrossing and outbreeding.
Here is just a few.
http://www.bulldoginformation.com/breeding-types.html
http://bowlingsite.mcf.com/genetics/inbreeding.html
http://www.netpets.org/cats/reference/info/inbreed.html
http://members.tripod.com/~Marge_S_2...inbreeding.htm
This one is very interesting.
http://goto.glocalnet.net/rat/gen/inbreeding.htm