The state or quality of being doubled, folded, or having two layers or components.
From 'biplicate' with the noun-forming suffix '-ity.' Related to 'plication' (the act of folding). Uncommon in modern usage.
While 'biplicity' is a grammatically valid word meaning 'the condition of being folded twice,' it's so rare that even many dictionaries don't include it—language evolves, and some words fade away even if they're technically correct.
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