Name Of A Process - white blood cells?

Question

So i took biology last year and we got told a name of a process where a white blood cells pushes its way throughthe capilary walls to reach infected areas (doesnt go through the cells, just pushes them out of the way. What is this process called - ITS NOT DIFFUSION! thanks, ill remeber it if i hear it, first to answer gets best answer :)

Answer 1

The word for this type of movement is "ameboid".  

Answer 2

I believe the word for the process you are looking for is diapedesis