Dictionary:

amphimacer

  (ăm-fĭm'ə-sər)

A trisyllabic metrical foot having an unaccented or short syllable between two accented or long syllables, as in Peter Pan. Also called cretic.

[Latin amphimacrus, from Greek amphimakros : amphi-, amphi- + makros, long.]

amphimacer [am‐fim‐ăsĕ], a Greek metrical foot, also known as the cretic foot. The opposite of the amphibrach, it has one short syllable between two long ones (thus in English verse, one unstressed syllable between two stressed, as in the phrase ‘bowing down’). Sometimes used in Roman comedy, it occurs rarely in English verse. Blake's ‘Spring’ is an example:

Sound the flute! / Now it's mute; / Birds delight / Day and night.