Bacterium

[Sarah]

A microscopic vegetable organism, belonging to the class Algæ,usually in the form of a jointed rodlike filament, and found inputrefying organic infusions. Bacteria are destitute of chlorophyll,and are the smallest of microscopic organisms. They are very widelydiffused in nature, and multiply with marvelous rapidity, both byfission and by spores. Certain species are active agents infermentation, while others appear to be the cause of certaininfectious diseases. See Bacillus.

[Sarah]

Bacterium is a bi-gendered creature, most often found in zombies. It is most often pink, but oftentimes green.

[Dorothey Allen]

a type of very small organism that lives in air, earth, water, plants, and animals, often one that causes disease:

[Dianne]

A member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.