amphibrach, n. [L. , Gr. short at both ends; 'amfi` + brachy`s short.].
A foot of three syllables, the middle one long, the first and last short (⌣ -- ⌣); as, h. In modern prosody the accented syllable takes the place of the long and the unaccented of the short; as, pro-phet\'b6ic. [1913 Webster]