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