Liposomes are small, artificially-created spheres whose walls are
phospholipid bilayers. They are made by mixing dry
phospholipids, such as
egg yolk, in water. The
lipid bilayer can fuse with the
lipids in
cell membranes, so liposomes hold much promise as agents for delivering
drugs or other chemicals directly into
cells.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.