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