What is the medical term meaning butt cheek?

The medical terms:

• Buttocks
• Maximus Gluteus (large muscles of buttocks)
• Gluteus Medius (smaller muscles of buttocks)
• Anus (opening)
• Rectum (lowest part of intestine leading to anus)
• Gluteal cleft, natal cleft, vertical gluteal crease (for the "crack" between the buttocks)