We found 2 dictionaries that define the word zero grades:

General (2 matching dictionaries)

1. zero grades: Merriam-Webster
2. zero-grades, zero grades: Wiktionary

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