The Collaborative International Dictionary of English v.0.48:

baculiform \baculiform\ adj.
   shaped like a rod.

   Syn: baccilar, bacillary, bacilliform, rod-shaped.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

baculiform
    adj 1: formed like a bacillus [syn: bacillar, bacillary,
           bacilliform, baculiform, rod-shaped]