anatomical snuffbox

Why is the triangular depression on the side of your hand called the anatomical snuffbox?

This depression of the skin formed between two prominent tendons on the thumb (the extensor pollicis brevis and the abductor pollicis longus)—most pronounced when extending the thumb outwards and upwards away from the other fingers—has been utilized by tobacco users as a handy (no pun intended) location to place powdered tobacco ("snuff") before inhaling it through the nose.