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.
Low G+C Gram-Positive Bacteria. Facultative or obligate anaerobes that lack cell walls (therefore, they stain pink when Gram stained-but they are NOT Gram-Negatives because of their nucleic acid sequences). Pleomorphic. Colonize mucous membranes of the respiratory and urinary tracts.