What's the plural form of viridescence? Here's the word you're looking for.
Answer
The noun viridescence can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be viridescence.
However, in more specific contexts, the plural form can also be viridescences e.g. in reference to various types of viridescences
or a collection of viridescences.
Examples
The swill of rain water and leaves of lapsed viridescence swashed onto the lip of the pavement.