Definition that contains hard mass
- coral root a wildflower of the genus Corallorhiza growing from a hard mass of rhizomes associated with a fungus that aids in absorbing nutrients from the forest floor
- faecalith a hard mass of fecal matter
- fecalith a hard mass of fecal matter
- coprolith a hard mass of fecal matter
- stercolith a hard mass of fecal matter