Pedants help me - Oranges...

[mistypeaks]

Are they Navel or Naval?
It is a 'little' query, but one that has been bugging me all morning!

Navel, I reckon. To do with bellybuttons, because that's what they look like.

From Wiki:

A single mutation in 1820 in an orchard of sweet oranges planted at a monastery in Brazil yielded the navel orange, also known as the Washington, Riverside, or Bahie navel. The mutation causes navel oranges to develop a second orange at the base of the original fruit, opposite the stem. The second orange develops as a conjoined twin in a set of smaller segments embedded within the peel of the larger orange. From the outside, the smaller, and undeveloped twin leaves a formation at the bottom of the fruit that looks similar to the human navel.

Thank you very much!!