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