What's the plural form of pterylography? Here's the word you're looking for.
Answer
The noun pterylography can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be pterylography.
However, in more specific contexts, the plural form can also be pterylographies e.g. in reference to various types of pterylographies
or a collection of pterylographies.
Examples
Pterylography must be based on the distribution of the follicles, for the ptilosis as seen externally does not reflect the actual pterylosis.