What does alexandrine mean?
The definition of alexandrine
Al`ex*an”drine, a.
Belonging to Alexandria; Alexandrian. Bancroft.
Al`ex*an”drine, n.
Etym: [F. alexandrin.]

A kind of verse consisting in English of twelve syllables. The needless Alexandrine ends the song, That, like a wounded snake, drags its slow length along. Pope.