Of or pertaining to two days before yesterday, three days ago.

From Latin “Nudius quartus” (“now is the fourth day”).

Compare:

Nudiustertian (the day before yesterday)

Nudiusquintan (four days ago)

Nudiussextian (five days ago)

Nudiusseptian (six days ago)

Nudiusoctan (one week ago)
“This particular production premiered to an enthralled audience on the nudiusquartian evening, whereupon many a gay laugh was had at the uproarious entertainment.”
by Alex-2598 March 7, 2023
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