De or het medeschepsel?

The correct Dutch article is:

het medeschepsel

Rule Words ending in -sel: usually het. See the rule

How to use medeschepsel

the medeschepselhet medeschepsel
this medeschepseldit medeschepsel
that medeschepseldat medeschepsel
our medeschepselons medeschepsel
your medeschepseljouw medeschepsel
every medeschepselelk medeschepsel
which medeschepsel?welk medeschepsel?
a big medeschepsel / the big medeschepseleen groot medeschepsel, het grote medeschepsel