Canticle n. : A song; esp. a little song or hymn.

Canticle n. : The Song of Songs or Song of Solomon, one of the books of the Old Testament.

Canticle n. : A canto or division of a poem

Canticle n. : A psalm, hymn, or passage from the Bible, arranged for chanting in church service.

Example:
What is the technological theme behind "a Canticle for Leibowitz"?

Taxonomy
Canticle, psalm, canticle of Canticles, song, verses, canticum, the Psalms, Canticle of Simeon, Prayer, hymn, Roman Breviary, the Old Testament, the Roman, Canticle of Zachary, Benedictus, free encyclopedia, Sundays, Luke 1.

Defination from the web:
canticle (from the Latin canticulum, a diminutive of canticum, song) is a hymn (strictly excluding the Psalms) taken from the Bible. ... It uses only a portion of the long canticle in Daniel, and condenses, expands, omits, and interverts verses and portions of verses. ...