We found one dictionary that defines the word zero-grades:

General (1 matching dictionary)

1. 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