1) Cara cara or Washington fruit 2) Fruit with an outie 3) Seedless citrus fruit 
• A type of orange in which the fruit incloses a small secondary fruit, the rind showing on the exterior a navel-like pit or depression at the apex. There are several varieties; they are usually seedless, or nearly so, and are much grown in California.
Na'vel or'ange A type of orange in which the fruit incloses a small secondary fruit, the rind showing on the exterior a navel-like pit or depression at the apex. There are several varieties; they are usually seedless, or nearly so, and are much grown in California. 
[n] - seedless orange enclosing a small secondary fruit at the apex
noun seedless orange enclosing a small secondary fruit at the apex
a seedless variety of orange having at the apex a navellike formation containing a small secondary fruit.