Synonyms for leaf

noun

1. The leafy organ of a plant

   leaflet, needle, bract, petiole, blade, frond, stalk, stipule, scale, protective leaf, floral leaf, leaf stalk, seed leaf, calyx leaf, bracteole, sepal, lithophyl, caulis, perianth, petal.

2. Matter in thin, smooth form

   skin, coat, sheath; see sheet 2.

in leaf

take a leaf from someone's book