The Collaborative International Dictionary
Antispast
Antispast \An"ti*spast\, n. [L. antispastus, Gr. ?, fr. ? to draw the contrary way; ? against + ? to draw.] (Pros.) A foot of four syllables, the first and fourth short, and the second and third long (#).
Wiktionary
antispast
n. A metrical foot composed of an iambus and a trochee