trochee -
A metricalfoot in verse consisting of a stressed syllable followed by an unstressed syllable.
Wikipedia
A trochee or choree, choreus, is a metrical foot used in formal poetry consisting of a stressed syllable followed by an unstressed one. Trochee comes from the Greek τροχός, trokhós, wheel, and choree from χορός, khorós, dance; both convey the "rolling" rhythm of this metrical foot.