The TRIAD is a loose Irish form that considers three things and their effects upon a person. We have no information upon specific metrical or rhyme requirements.

Examples 1 & 2 by Jan Haag:

#190 Triad

The rise of the sun
The set of the moon
And rain

Quotidian life
Diurnal sweet death
Returns

The blaze of the sun
The silver pale moon
Ann's bliss
----
----

Triad II

Freeway Park
Fountain Thundering
Blue-Black Pigeon
In the Sand
Wings at Point
Tail at Rest
Head Down
Asleep
Forever