Avocado

An avocado  is a pear-shaped fruit with dark green, leathery skin, a large stony seed, and greenish-yellow edible pulp. 

Originally the Aztecs called this fruit ahucatl after their word for testicle. This is may be partly due to the fruit's resemblance to a testicle, but also because it was supposedly believed to be an aphrodisiac. To the Spaniards ahucatl sounded like avocado (=advocate, Spanish), and so the fruit came to Europe, via Spain, under that name.