triūnus

Meaning

1. Medieval LatinNew Latinadjectivetriune
   Coniunge igitur ista, quae videntur opposita, antecedenter, ut praedixi; et non habebis unum et tria vel e converso, sed unitrinum seu triunum.Therefore combine these things, which seem opposites, antecedently, as I said before; and you will not have one and three or the converse, but unitrine and triune.1440, Nicholas of Cusa, “Capitulum XIX. Transumptio trianguli infiniti ad trinitatem maximam”, in De docta ignorantia, volume 1:
   O mirabilissimus deus, qui neque es numeri singularis, neque numeri pluralis, sed super omnem pluralitatem et singularitatem unitrinus et triunus.Oh most wonderful god, who is neither of the singular number, nor of the plural number, but above all plurality and singularity, unitrine and triune.1453, Nicholas of Cusa, De Visione Dei:

Declension

Origins

From tri- + ūnus. The noun triūnitās is attested in some late antique and medieval Christian texts as an alteration of trīnitās, apparently for the sake of emphasizing the theological concept of the trinity being one god in three persons. Subsequently, the adjective form triūnus is mentioned alongside the noun triūnitās in a list of words derived from trēs in Derivationes, an etymological dictionary attributed to the grammarian Huguccio of Pisa (now thought to be a different person from the canonist named Huguccio).