De or het coprologie?

The correct Dutch article is:

de coprologie

Rule Words ending in -logie: always de. See the rule

How to use coprologie

the coprologiede coprologie
this coprologiedeze coprologie
that coprologiedie coprologie
our coprologieonze coprologie
your coprologiejouw coprologie
every coprologieelke coprologie
which coprologie?welke coprologie?
a big coprologieeen grote coprologie
the big coprologiede grote coprologie