caesura

also cesura
[Latin 'caesura', a cutting, from 'caesus', past participle of 'caedere', to cut off]

n.
1. A pause in a line of verse dictated by sense or natural speech rhythm rather than by metrics.
2. A pause or interruption, as in conversation.
3. In Latin and Greek prosody, a break in a line caused by the ending of a word within a foot, especially when this coincides with a sense division.
4. In music, a pause or breathing at a point of rhythmic division in a melody.