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