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