leaf cutter

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) Any one of various species of wild bees of the genus Megachile, which cut rounded pieces from the edges of leaves, or the petals of flowers, to be used in the construction of their nests, which are made in holes and crevices, or in a leaf rolled up for the purpose. Among the common American species are Megachile brevis and Megachile centuncularis. Called also rose-cutting bee.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative spelling of leaf-cutter.