Definition of "duology" [duology]

• A series comprised of two parts, particularly in genre fiction. (noun)

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• "And by this I most certainly don't mean to say that this duology is meant for children only - it's more like a book for children of all ages."
• "Bear's Promethean Age novels are some of the best fiction being published today and 2008's Stratford Man duology is no exception."
• "The first part of this two part film, or duology which isn't even a word!"