hi qms! Great question. Right now we at Wordnik do not write any definitions ... we only show those from published dictionary sources. So if anthropophage isn't in one of our sources, we won't have a definition for it. I hope this makes sense!
I am surprised that, while Wordnik has an entry for anthropophage, it does not have a definition for the word. (It means cannibal.) The entry reports that the word has been looked up 270 times. I wonder why a word so often investigated is not defined. The great majority of Google hits on the word are on French language sites, but some are in English. Besides, if Wordnik will define such imports as "pourboire" and "gamin," even making them Words of the Day, why not anthropophage? Is there some sort of threshold of interest that must be crossed before a word earns a definition?