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