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