BACILLAR is a 8 letter word that starts with B.

1. \Ba*cil"lar\, a. [L. bacillum little staff.] (Biol.)
   Shaped like a rod or staff.
   
   

2. \Ba*cil"lar\, a. (Biol.)
   Pertaining to, or produced by, the organism bacillus;
   bacillary.