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