road apple
nounEtymology Probably with reference to the supposed similarity to rotten apples.
- Samples 7–12 contained coarsely chewed plant material; several closely resembled the "road apples" of horse and burro.1964, P. S. Martin, F. W. Sharrock, “Pollen Analysis of Prehistoric Human Feces: A New Approach to Ethnobotany”, in American Antiquity, volume 30, number 2, page 171: