We found one dictionary that defines the word dual grammatical number:

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1. Dual grammatical number: Wikipedia, the Free Encyclopedia

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