Geraldine is a large radish which appeared in the third season Fraggle Rock episode "The Great Radish Caper."
Grown in the Gorgs' Garden, Geraldine is an abnormally large example of a radish, the result of constant love and nurturing by Junior Gorg. Geraldine is the closest thing Junior has to a friend, and barely escapes consumption by Boober Fraggle and the others. Other radishes have also been named by Junior, including Betty, but Geraldine remains his favorite.
Geraldine is later referenced in the Back to the Rock episode "When Mokey Met Lanford," where Junior refers to one particular radish as such.