A metrical foot pattern in poetry that features one stressed syllable followed by two unstressed syllables?

The metrical foot pattern you're describing is called amphibrach.

Here's a breakdown:

* Amphibrach: A metrical foot with the stress pattern: unstressed - stressed - unstressed (˘˘).

Example:

The word "above**" is an amphibrach.

Poetry:

Amphibrachic feet are commonly found in poetry, often creating a flowing and conversational rhythm.

Example:

> "And in the sea of life endured" (From "The Raven" by Edgar Allan Poe)

Let me know if you'd like to explore other metrical foot patterns!