Janus-like ambidextrous bifacial bifold biform bilateral binary binate biparous bivalent conduplicate disomatous double double-faced dual duple duplex duplicate filmy foliaceous foliated geminate geminated in layers lamellar lamellate lamellated lamelliform laminate laminated laminous leaflike leafy membranous scummy second secondary spathic spathose stratified stratiform three-ply twin twinned two-faced two-level two-sided two-story twofold