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