The "terminal" is a poetic form reportedly invented by John Tranter.
A terminal is based on a poem that someone else has already written, which we'll call the source poem. Each line of the terminal ends with the same word as the corresponding line in the source poem.
For example, let's take the famous poem "Roses Are Red," by Anonymous:
Roses are red,
Violets are blue,
Sugar is sweet,
And so are you.
A terminal based on "Roses" would have to end its lines with, respectively, red, blue, sweet and you:
Blood shed by friendly fire is no less red.
The bruise the lover leaves is fully blue.
Sugar cut with arsenic is sweet
but fatal nonetheless—and so are you.
My collection of terminals sourced from Canadian poems, Some of Us and Most of You Are Dead, is forthcoming in fall 2018 from Buckrider Books.