de·trit·i·vore 
(dĭ-trītə-vôr′)
(dĭ-trītə-vôr′)n.
An organism, such as a bacterium, fungus, or insect, that feeds on dead plant or animal matter.
[German Detritivor : Latin dētrītus, something worn away, detritus (from past participle of dēterere, to lessen, wear away; see DETRIMENT) + Latin -vorus, eating, feeding on; see -VOROUS.]