We found 2 dictionaries that define the word protoplanetary discs:

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1. protoplanetary discs: Wiktionary

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2. Protoplanetary discs: Encyclopedia

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