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