hesperidium
I discovered recently that a fruit with the same sort of structure as, e.g., an orange is called a hesperidium.
Why that curiously beautiful word? Well, you see, Greek mythology features the golden apples of the Hesperides, and oranges look kinda like apples but are kinda-sorta golden in colour.
(The Hesperides are the nymphs of the West, the land of the evening (hesperos); presumably the similarity to the Latin equivalent Vesper is no coincidence, but I know no more.)