Beaks, Greek and Bones
Three weeks ago, in a comedy attempt to climb onto my bike and start cycling (something I clearly need more practice at), I bashed my coccyx. It’s still sore, so I’ve taken an unnatural interest in the word. First, I learnt how to spell it*. Then I found out it is triangular and bears a striking resemblance to a cuckoo’s beak. Apparently. I can only assume no other bird has a triangular beak quite the same. The Greeks obviously had the best sounding word for cuckoo (kokkyx) and so there we have it. If you’re interested, the plural is coccyges.
* Robert smugly said I should have known this already, for playing Scrabble with. I smugly pointed out how wrong he was. That is, until I remembered about the blanks. Still, it would still be a rare feat.