What's the plural form of edingtonite? Here's the word you're looking for.
Answer
The noun edingtonite can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be edingtonite.
However, in more specific contexts, the plural form can also be edingtonites e.g. in reference to various types of edingtonites
or a collection of edingtonites.