a metrical foot consisting, in Greek and Latin verse, of one short syllable between two long ones, or, in English verse, of one unaccented syllable between two accented ones (Ex.: |hésĭtáte|)
See amphimacer in American Heritage Dictionary 4
(ăm-fĭmˈə-sər)
noun
A trisyllabic metrical foot having an unaccented or short syllable between two accented or long syllables, as in Peter Pan. Also called cretic.