phyl·lode 
(fĭlōd) also phyl·lo·di·um (fĭ-lōdē-əm)
(fĭlōd) also phyl·lo·di·um (fĭ-lōdē-əm)n. pl. phyl·lodes also phyl·lo·di·a (-lōdē-ə)
A flattened leafstalk that functions as a leaf, as in an acacia.
[New Latin phyllōdium, from Greek phullōdēs, leaflike : phullon, leaf; see PHYLLO- + -ōdēs, adj. suff.; see COLLODION.]
phyl·lodi·al adj.