What is the meaning of \vec{A} \times \vec{B}_\bot in vector notation?

[coffekreizy]

If A=(A1,A2,A3) and B=(B1,B2,B3), WHAT does this notation mean? :

(\vec{A} \times \vec{B})_\bot

 

[nicksauce]

Presumably that means to take the cross product of A and B, and then project out the part that is perpendicular to something.