• (n.) One of a tribe of beetles (Xylophili) whose larvae live on decayed wood.
Xy·loph'i·lan noun [ See Xylophilous .] (Zoology) One of a tribe of beetles ( Xylophili ) whose larvæ live on decayed wood. 
xylophilan Belonging to the group Xylophili of beetles, that live in decayed wood; a beetle of this group.