Množina: arias

ETYM Italian, from Latin aër. Related to Air.
An elaborate song for solo voice.
Melody, especially solo for voice in opera or oratorio.
Melodic solo song of reflective character, often with a contrasting middle section, expressing a moment of truth in the action of an opera or oratorio. Pioneered by Giacomo Carissimi, it became a set piece for virtuoso opera singers, for example Handel’s aria “Where’er you walk” from the secular oratorio Semele 1744 to words by William Congreve. As an instrumental character piece, it is melodious and imitative of a vocal line.

Množina: Ariadnes

Beautiful daughter of Minos and Pasiphae; she fell in love with Theseus and gave him the thread with which he found his way out of the Minotaur's labyrinth.
In Greek mythology, the daughter of Minos, King of Crete. When Theseus came from Athens as one of the sacrificial victims offered to the Minotaur, she fell in love with him and gave him a ball of thread, which enabled him to find his way out of the labyrinth. When Theseus abandoned her on the island of Naxos, she married Dionysus.

Množina: Arians

A constellation between Pisces and Taurus pictured as a ram.

Množina: Arianisms

The theological doctrine taught by Arius that Christ the Son was not consubstantial with God the Father.
A system of Christian theology that gave God the Father primacy over Christ. It was founded about 310 by Arius, and condemned as heretical at the Council of Nicaea 325.
Some 17th- and 18th-century theologians held Arian views akin to those of Unitarianism (that God is a single being, and that there is no such thing as the Trinity). In the 1970s the question of the heresy arose again for the Vatican in the writings of such theologians as Edouard Schillebeeckx of the Netherlands.