Placename on Booterstown register (Dublin area)

[Rakiura John]

Hi
Attached is a screenshot of 1875 Marriage Register (Catholic parish of Booterstown, Archdiocese of Dublin). I'm stumped on the place I've indicated, which appears so often on the page that it would make sense for it to be an abbreviation for "Booterstown" itself. However the letters don't seem to support this. Can anyone clarify what this placename is?
Secondly, can anyone give me a translation for what's written in the final column, for the second marriage (Whelan/Doyle) on the page. I wish to know if it contains something important to the circumstances of the marriage.
Thanks

[Rakiura John]

Here is a zoomed-in copy of that final column ...

[Rakiura John]

So it's not "Booterstown", as that place is actually written as Booterstown on the page (under the 4th highlighted appearance of my mystery word).

[shanreagh]

Without being able to read the column heading that the abbreviation comes under my guess is that it relates to the residence or birth place of the parties being married. 
Perhaps it is short for 'lives within the Archdiocese of Dublin'?  There are some County names there. 

[Rakiura John]

Yes the Column heading is "Eorum Residentia", which means "Their Residence".

[Rakiura John]

Ahhh, perhaps its an abbreviation for a Latin word for "deceased"!!

[heywood]

It would be from ‘defunctus’ - deceased
https://www.irish-genealogy-toolkit.com/latin-irish-parish-registers.html

Here is the civil record which indicates that the fathers’ were deceased
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1875/11212/8109811.pdf

Added - that is the column for the parents’ residence

[Rakiura John]

Thanks for your help.
Cheers, John

[Wexflyer]

Under final column, you may not like what it says.

Basically, married by special permission of the Vicar General, as one of the two was an itinerant with no fixed abode.