proetic

Being or having the element of proetry: poetic prose, in works such as "This Is Just To Say" by William Carlos Williams, where the writing itself communicates some beyond the literal content of the words themselves, but isn't in a common poetic form (such as a limerick, couplet, a sonnet, et cetera)

I have eaten
the plums
that were in
the icebox

and which
you were probably
saving
for breakfast

Forgive me
they were delicious
so sweet
and so cold

... how proetic.