|the offspring of a zebra and a donkey.|
|a scrap or morsel of food left at a meal.|
retrocession ret·ro·ces·sion (rět'rō-sěsh'ən)
A relapse, as of a disease.
Cessation of the external symptoms of a disease, followed by signs of involvement of an internal organ or part.
Backward displacement of the uterus or other organ.