The long nose of an elephant is called a trunk.
I feel that I've read things like this in my childhood:
The men blindly felt for the elephant. Someone touched its trunks and said, "So long and hard and thick. It seems to be a tree!"
Bambo kicked that scrawny little thing out of his way with his trunks.
Rani, the large Indian elephant Mr. Fox kept as pet, stomped its trunks in hunger.
which imply an elephant's legs are also referred to as trunks. I also thought tree trunks were just like an elephant's legs, so they're called trunks too. However, no dictionary says so. See trunk.
I don't know why but I just can't accept this. I clearly remember I did read things like that in children's stories.