We found one dictionary that defines the word back of the envelope calculations:

General (1 matching dictionary)

1. Back-of-the-envelope calculations: Wikipedia, the Free Encyclopedia

▸ Words similar to back of the envelope calculations ▸ Usage examples for back of the envelope calculations ▸ Idioms related to back of the envelope calculations ▸ Wikipedia articles (New!) ▸ Words that often appear near back of the envelope calculations ▸ Rhymes of back of the envelope calculations ▸ Invented words related to back of the envelope calculations