caesura

Short definition from Wiktionary

Noun

1. 1
   A pause or interruption in a poem, music, building, or other work of art.
2. 2
   Using two words to divide a metrical foot.
3. 3
   The caesura mark ‖ or ||.
4. 4
   A break of an era or other measure of history and time; where one era ends and another begins; turning point.