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.
This red or pink pigmented bacterium known as Serratia marcescens is the most common cause of the pink âstuff.â Serratia bacteria are common inhabitants of the environment and can be found in many places, including human and animal feces, dust, soil, and in surface waters.his red or pink pigmented bacterium known as Serratia marcescens is the most common cause of the pink âstuff.â Serratia bacteria are common inhabitants of the environment and can be found in many places, including human and animal feces, dust, soil, and in surface waters.