Pleomorphism refers to the existance of 2 or more structural forms in the life cycle of an organism. 

In bacteriology, it refers to the variation in the structural forms exhibited by a bacteria. Eg: Mycoplasma is a highly pleomorphic bacteria.

1. Eaton agent
2. Fried egg appearance
3. RGUHS Karnataka PGET 2011 – MCQ 168
4. Sanitation barrier