(n.) The reverse, or left-hand, page of a book or a folded sheet of paper; -- opposed to recto.

Gospel side acknowledgments back back matter bastard title bibliography cantorial side catch line catchword colophon contents contents page copyright page dedication endleaf endpaper endsheet errata flyleaf folio fore edge foreword front matter half-title page head imprint index inscription introduction larboard leaf left left hand left wing left-hand side left-winger liberal makeup near side page port port tack portside preface preliminaries radical recto reverso running title signature subtitle table of contents tail text title title page trim size type page wrong side