If you'll pardon the expression, there is a lot of b****cks written about this on the Internet - particularly in relation to avocados.
Many websites will tell you that avocados were named after testicles. I may have misunderstood, but I don't think this is correct.
Not for the first time, I turned to Wikipedia for clarification. Here I found, "The word 'avocado' comes from the Spanish aguacate, which in turn comes from the Nahuatl word āhuacatl, which goes back to the proto–Aztecan *pa:wa which also meant 'avocado'. Sometimes the Nahuatl word was used with the meaning 'testicle', probably because of the likeness between the fruit and the body part."
This is not exactly crystal clear, but I think Wikipedia is saying that the English word 'avocado' is derived, via Spanish, from a native South American word for the fruit; and that the South American natives sometimes used the same word to refer to their testicles. In much the same way, I imagine, as in English we might use the word 'balls', or its diminutive, 'b****cks'.
With orchids, it's the other way round; orchids actually are named after testicles. The word 'orchid' is derived from the Greek word for a testicle, because of the shape of the twin tubers in some species of orchid. The same word is used in some medical contexts to refer to a testicle; for example, the surgical removal of a testicle is an orchidectomy.
© Macclesfield Quiz League 2018