an animal that feeds on dead organic material, especially plant detrituscities left in ruins (detritus), or debris lefts over from a rock concert; left over garbage in a stadium when the event is over; cast-offs (detritus) of famous people; leftover items (detritus) from childhood, etc.; an example of a detritivore is an earthworm, which obtains nutrients from decomposng plant and animal matter, even feces