The Collaborative International Dictionary of English v.0.48:

Choliamb \Cho"li*amb\, Choliambic \Cho`li*am"bic\, n. [L.
   choliambus, Gr. ?; ? lame + ? an iambus.] (Pros.)
   A verse having an iambus in the fifth place, and a spondee in
   the sixth or last.
   [1913 Webster] Cholic