Trochaic octameter is a poetic meter that has eight trochaic metrical feet per line. Each foot has one stressed syllable followed by an unstressed syllable. In the example below, from Edgar Allen Poe’s The Raven, each foot is separated by a red, bold pipe character. Emphasized syllables are in all capital letters, and unemphasized syllables are in lower case.
ONCE u | PON a |MIDnight| DREARy |WHILE i | PONdered | WEAK and | WEARy….
– line 1 of The Raven