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