Bacillaceae

[băs′ə-lāsē-ē′]
n.
  1. A family of bacteria including the genera Bacillus and Clostridium that are generally rod-shaped, gram-negative, and spore-producing.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.