| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| the offspring of a zebra and a donkey. |
liposome lip·o·some (lĭp'ə-sōm', lī'pə-)
n.
An artificial microscopic vesicle consisting of an aqueous core enclosed in one or more phospholipid layers, used to convey vaccines, drugs, enzymes, or other substances to target cells or organs.