| the offspring of a zebra and a donkey. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
Balfour Bal·four (bāl'f&oobreve;r', -fôr'), Francis Maitland. 1851-1882.
Scottish embryologist and zoologist noted for his studies of the development of the urogenital and nervous systems in vertebrates.