bifold

noun 0.674

foldout

noun 0.653

foldover

noun 0.616

double spread

noun 0.582

gateleg

noun 0.570

fold

noun 0.570

foldable

noun 0.570

foldaway

noun 0.562

folding

noun 0.551

bifolio

noun 0.531

foldback

noun 0.518

back cover

noun 0.513

fold flat

noun 0.509

folio

noun 0.508

double file

noun 0.504

slipcase

noun 0.502