two-fold Copy link Outline 1. duplex, plĭcis (having two folds or layers, also opp. to single).2. duplus (twice as much)3. gĕmĭnus • two-fold: 1. duplex, plĭcis (having two folds or layers, also opp. to single). 2. duplus (twice as much): to condemn a thief to restore t., furem dupli condemnare, Cat. R. R. pref. 3. gĕmĭnus: v. double.