This is the 7813th most frequent Dutch word.
domui
The word "domui" does not exist in Dutch.
Here, 'domui' is presumably a noun, used to refer to an entity or object that might be known in context.
Ik heb de domui gezien in zijn natuurlijke habitat.
I have seen the domui in its natural habitat.
'Domui' is used again as a noun to describe a subject of interest, possibly an animal or phenomenon salient to the discussion.
De domui lijkt erg zeldzaam te zijn in deze streek.
The domui appears to be very rare in this region.
In this case, 'domui' indicates a particular object or term that one is instructed to observe or record related to.