De or het rinologie?

The correct Dutch article is:

de rinologie

Rule Words ending in -logie: always de. See the rule
Meaning (Dutch) (medisch) neusheelkunde

How to use rinologie

the rinologiede rinologie
this rinologiedeze rinologie
that rinologiedie rinologie
our rinologieonze rinologie
your rinologiejouw rinologie
every rinologieelke rinologie
which rinologie?welke rinologie?
a big rinologie / the big rinologieeen grote rinologie, de grote rinologie

Dutch words ending in rinologie

endocrinologie

In compound words, the last part decides the article. See the rule

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