What is propandial?

Answer 1

I know that:

Prepandial = Before eating a meal

Postpandial = After eating a meal

I am not sure what propandial is.

Answer 2

It seems like there may be a spelling mistake. If you meant "propanal," it is a colorless liquid used as a chemical intermediate in the production of various chemicals. If you meant something else, please provide more context for a more accurate answer.