I read from diplopod to dipterocarp.

The lungfish is not the fish I thought it might be that I mentioned in the episode but they do have the ability to breathe air!

https://en.wikipedia.org/wiki/Lungfish

There are fun shapes related to "dipole".

https://en.wikipedia.org/wiki/Dipole

Dipper birds have bobbing and dipping movement and can dive and swim underwater. 

https://en.wikipedia.org/wiki/Dipper

A more modern name for "dipsomania" is "Alcohol Dependence S ...