caesura

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From our dictionary:
cae•su•ra

(si•zhoor'u, -zoor'u, siz•yoor'u), —n., —pl.cae•su•ras, cae•su•rae (si•zhoor'E, -zoor'E, siz•yoor'E).
1. Pros. a break, esp. a sense pause, usually near the middle of a verse, and marked in scansion by a double vertical line, as in know then thyself || presume not God to scan.
2. Class. Pros. a division made by the ending of a word within a foot, or sometimes at the end of a foot, esp. in certain recognized places near the middle of a verse.
3. any break, pause, or interruption. Also, cesura.