Alexandrine

Alexandrine verse is twelve-syllable.

Source: tatoeba (12300555)

The dominant metre in Les Fleurs du Mal is the twelve-syllable alexandrine, the defining metre of French versification, with the eight-syllable line a distant runner-up and the ten-syllable line barely visible.

Source: wiktionary

The division of Scholz himself, in the work last named, is into the Alexandrine and Constantinopolitan recension. […] But in amalgamating the Alexandrine and Western Mss. together, he has done not a little violence to both. Moreover, taking the fact as true, which Eusebius has related in respect to his making out fifty copies of the New Testament for the churches at Constantinople, in the time of Constantine; and the fact also that Eusebius is known, by the quotations in his works, to have given a preference to the Alexandrine copies; how can the superiority or even the discrepancy of the Constantinopolitan class of Mss. in respect to the Alexandrine, be so definitely made out?

Source: wiktionary

Dioscorus sent a man there called Eutyches, a monk—monks had been too useful to Alexandrine politics to be abandoned.

Source: wiktionary