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