Structure
Caesura
From Latin caesura: a cutting. Obligatory in Old English alliterative verse; variable in classical and Renaissance poetry; powerfully used by Dickinson.
Definition
A pause within a line of verse, created by syntax, punctuation, or sense, dividing the line into two hemistichs.
Example
'To err is human; || to forgive, divine.' (Pope) — the semicolon marks a medial caesura.