![[No comments]](/nb/assets/no-comments.png "No comments")
Why is a cross between a grapefruit and a tangerine called a tangelo? Because the grapefruit is a cross between an orange and something called a pomelo. I've never had a pomelo, but it must be just about the most citric acid-laden fruit in the world if you cross it with an orange and get a grapefruit, and then cross it with a tangerine and get a tangelo.