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