De or het dactylologie?

The correct Dutch article is:

de dactylologie

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

How to use dactylologie

the dactylologiede dactylologie
this dactylologiedeze dactylologie
that dactylologiedie dactylologie
our dactylologieonze dactylologie
your dactylologiejouw dactylologie
every dactylologieelke dactylologie
which dactylologie?welke dactylologie?
a big dactylologie / the big dactylologieeen grote dactylologie, de grote dactylologie

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