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We found one dictionary with English definitions that includes the word twentieth centuries:
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General (1 matching dictionary)

1. twentieth centuries: Vocabulary.com [home, info]

▸ Words similar to twentieth centuries ▸ Usage examples for twentieth centuries ▸ Idioms related to twentieth centuries (New!) ▸ Words that often appear near twentieth centuries ▸ Rhymes of twentieth centuries ▸ Invented words related to twentieth centuries