We found one dictionary that defines the word pi approximation day:

General (1 matching dictionary)

1. Pi Approximation Day: Wikipedia, the Free Encyclopedia

▸ Words similar to pi approximation day ▸ Usage examples for pi approximation day ▸ Idioms related to pi approximation day ▸ Wikipedia articles (New!) ▸ Words that often appear near pi approximation day ▸ Rhymes of pi approximation day ▸ Invented words related to pi approximation day