teratoma. [terâ²ÉtÅâ²mÉ] pl. teratomas, teratomata. a tumor composed of different kinds of tissue, none of which normally occurs together or at the site of the tumor. Teratomas are most common in the ovaries or testes.
The pink-colored film or ring frequently seen on showers, tubs, toilets and pet water bowls is typically caused by growth of the airborne bacteria Serratia marcesens. This harmless nuisance organism reacts with standing water and frequently forms during spring and summer months.
A classic example of bacteria culprit that you may find in your bathroom is bathroom bugs. Bathroom bugs, from the name itself, are creepy crawlers that are found in the bathroom. The term is quite general and it is used to refer on almost any kind of bug and other pests that you might see around your bathroom.