The Collaborative International Dictionary of English v.0.48:

Amphiprostyle \Am*phip"ro*style\, a. [L. amphiprostylos, Gr. ?
   having a double prostyle: cf. F. amphiprostyle. See
   Prostyle.] (Arch.)
   Doubly prostyle; having columns at each end, but not at the
   sides. -- n. An amphiprostyle temple or edifice.
   [1913 Webster]

WordNet (r) 3.0 (2006):

amphiprostyle
    adj 1: marked by columniation having free columns in porticoes
           either at both ends or at both sides of a structure [syn:
           amphiprostylar, amphiprostyle, amphistylar,
           porticoed]