De or het defensie-elektronica?

The correct Dutch article is:

de defensie-elektronica

Rule Words ending in -ica: usually de. See the rule

How to use defensie-elektronica

the defensie-elektronicade defensie-elektronica
this defensie-elektronicadeze defensie-elektronica
that defensie-elektronicadie defensie-elektronica
our defensie-elektronicaonze defensie-elektronica
your defensie-elektronicajouw defensie-elektronica
every defensie-elektronicaelke defensie-elektronica
which defensie-elektronica?welke defensie-elektronica?
a big defensie-elektronica / the big defensie-elektronicaeen grote defensie-elektronica, de grote defensie-elektronica