microbiologist

/ˌmaɪkroʊbaɪˈɑlədʒɪst/
noun
  1. A scientist who studies microorganisms, such as bacteria, viruses, and fungi.
    • The hospital hired a microbiologist to help identify the source of the infection.
    • The microbiologist discovered a new strain of bacteria in the soil.
    • As a microbiologist, she spends most of her day looking through a microscope.