A blank leaf in the front or back of a book.

Roget 228: interposition, interjacence^†, intercurrence^†, intervenience^†, interlocation^†, interdigitation, interjection, interpolation, interlineation, interspersion, intercalation.    [interposition at a fine-grained level] interpenetration; permeation; infiltration.    [interposition by one person in another's affairs, at the intervenor's initiative] intervention, interference; intrusion, obtrusion; insinuation.    insertion etc. 300; dovetailing; embolism.    intermediary, intermedium^†; go between, bodkin^†, intruder, interloper; parenthesis, episode, flyleaf.    partition, septum, diaphragm; midriff; dissepiment^†; party wall, panel, room divider.    halfway house.    ... show more

Dutch: respectblad, schutblad