conduplicate

from The Collaborative International Dictionary of English v.0.48

Conduit railway \Conduit railway\
   [Webster 1913 Suppl.] Conduplicate \Con*du"pli*cate\, a. [L.
   conduplicatus, p. p. of conduplicare. See {Duplicate}.]
   (Bot.)
   Folded lengthwise along the midrib, the upper face being
   within; -- said of leaves or petals in vernation or
   [ae]stivation.
   [1913 Webster]