0 in poetry, a foot (= a unit of division of rhythm) with two short or unstressed (= not strong) syllables followed by one long or stressed syllable, as in the word "understand":
In "Non so pi", each phrase consists of three anapests.
The metrical pattern might be iambic pentameter, ballad stanza, anapests, trochees, or dactyls.
You can scan the second foot as either an anapest or an elided iambic.
