Search the Dictionary:

 
A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z
 

bacillus:

A group of rod-shaped bacteria. One kind of bacillus causes diphtheria. [Bacillus comes from a Latin word meaning “little rod.”]