Pelvis means basin.

The bones that the pelvis consists of are:

• Ilium
• Ischium
• Pubis

During a yoga class, teachers can refer to the pelvis as a basin to help explain how they want you to move, or align the pelvis. For example in a forward bend, you tilt the pelvis in such a way, that if you imagine your pelvis to be a basin, water would fall out on the front.