De or het cryologie?

The correct Dutch article is:

de cryologie

Rule Words ending in -logie: always de. See the rule
Meaning (Dutch) (medisch, wetenschap) wetenschap van het invriezen

How to use cryologie

the cryologiede cryologie
this cryologiedeze cryologie
that cryologiedie cryologie
our cryologieonze cryologie
your cryologiejouw cryologie
every cryologieelke cryologie
which cryologie?welke cryologie?
a big cryologie / the big cryologieeen grote cryologie, de grote cryologie

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).