n. (Gr. phyllon, leaf; eidos, form) a winged petiole with flattened surfaces placed laterally to the stem and functioning as a leaf.
a leaf petiole modified for photosynthesis.
an expanded petiole taking on the function of a leaf blade
a leaf that has an enlarged midrib and no blades
A flattened, leaflike peticole (q.v.).
a leaf whose blade is much reduced or absent, and whose petiole and rachis have assumed the functions of the whole leaf. cf. cladode.
Resembling a leaf; a term applied to tumours which on section show a lobulated, leaflike appearance
A flat expanded petiole that replaces the blade of a foliage leaf and fulfills the same functions. See also: cladophyll.