What's the plural form of reviviscence? Here's the word you're looking for.
Answer
The noun reviviscence can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be reviviscence.
However, in more specific contexts, the plural form can also be reviviscences e.g. in reference to various types of reviviscences
or a collection of reviviscences.
Examples
In this age we have a sort of reviviscence, not, I fear, of the power, but of a taste for the power, of the early times.