Versification is the process of combining poetic form and language to create poetry.
Main feature is distinction between stressed and unstressed syllables
foot = unstressed syllable followed by stressed
--Iambic tetrameter
x X | x X | x X | x X
Here is an example of a poem written in iambic tetrameter.
On Translating Eugene Onegin (Vladimir Nabokov)
What is translation? On a platter
x X x X x x x X x
A poet’s pale and glaring head,
x X x X x X x X
A parrot's screech, a monkey's chatter,
xXxXxXxXx
And profanation of the dead.
xx xX xx xX
Here is more examples.
pyrrhic foot is a foot that consists of two unstressed sylables.
Trochee is a type of metrical foot consisting of two syllables—the first is stressed and the second is an unstressed syllable. The pattern reads as “LAD-der.”
A line of poetry with this type of foot has a trochaic meter.
Alexander Pushkin wrote "Tale of Tsar Saltan" (1831) in trochaic tetrameter.
Tetrameter means that in one poetic line of this poetic fairy tale there are four trochaic feet.
Here is more examples.
Three young maidens sat one night
X x | X x | X x | X
Spinning in the window-bight.
X x | x x | X x | X