More About Bricks

http://www.beginnertriathlete.com/Enrico%20Contolini/Introduction_to_bricks.htm
"Bricks are a very important part of triathlon (and duathlon) training and they are sometimes overlooked. Bricks refer to training on two disciplines during the same workout, one after the other with minimal or no interruption in between, just as you would do in a race (I am sure you knew this). Usually when people talk about bricks they refer to a bike/run workout, but bricks could also refer to a swim/bike workout or to a run/bike workout (if you are training for a duathlon). These last two are often overlooked but still important to fit here and there in your training plan."
"Here are a couple of bike/run examples:
Sprint triathlon workout: (5-6 miles bike + 1mile run) - repeat three or four times.
Olympic triathlon workout: (7-8 miles bike + 1.5-2 mile run) - repeat three or four times."

And here's just some Triathlon info:
http://www.hulaman.com/triathlon/tricks.html