a. Eccl. Hist. [ad. med.L. quinisexta (trans. G. πενθέκτη sc. σύνοδος), f. quīnī five each, five + sext-us sixth.] Quinisext Council: The Council in Trullo, convoked by Justinian II. at Constantinople in 692, so called because it was regarded as supplementary to the fifth and sixth œcumenical councils.
1657. J. Cosin, Canon Script., ix. 143. Towards the end of this Century the Sixt General Council was held at Constantinople, and the Quini-sext there in Trullo.
1890. T. W. Allies, Peters Rock, 263. Justinian II. summoned a Greek Council to meet in the same hall of his palace, called the Dome . It called itself the Quinisext.
So Quinisextine a.
1868. Lightfoot, Philip., 186, note. He quotes Can. 10 of the Quinisextine Council as favouring his view.