"I was getting sick of her flinching every time she looked at my
-- Harry Potter about Professor Trelawney (PA15)
Divination by studying the lines on the palm of the hand.
Palmistry is also known as chiromancy from the Greek "kheir" for hand, and "manteia" for divination. It is an ancient practice found in many cultures around the world. Various lines correspond to the heart, head, and length of life. source: Wikipedia