1911 Encyclopædia Britannica/Caesura
CAESURA (Lat. for “cutting,” Gr. τομη), in prosody, a rest or pause, usually occurring about the middle of a verse, which is thereby separated into two parts (κωλα, members). In Greek and Latin hexameters the best and most common caesura is the penthemimeral (i.e. after the 5th half-foot):
Arma vi | rumque ca | no, Tro | jae qui | primus ab | oris.
Another caesura very common in Homer, but rare in Latin verse, is after the 2nd syllable of the 3rd dactyl:
On the other hand, the hephthemimeral caesura (i.e. after the 7th half-foot) is common in Latin, but rare in Greek:
The “bucolic” caesura, peculiar to Greek (so called because it is chiefly found in writers like Theocritus) occurs after the 4th dactyl:
In the pentameter verse of the elegiac distich the caesura is always penthemimeral. In the iambic trimeter (consisting of three dipodia or pairs of feet), both in Greek and Latin, the most usual caesura is the penthemimeral; next, the hephthemimeral:
Supplex | et o | ro reg | na per | Proser | pinae.
The best treatise on Greek and Latin metre for general use is L. Müller, Die Metrik der Griechen und Römer (1885); see also the article Verse.