microbiologist
🇺🇸
/ˌmaɪkrəʊbaɪˈɑːlədʒɪst/
🇬🇧
/ˌmaɪkrəʊbaɪˈɒlədʒɪst/
A person who studies tiny living things like bacteria and viruses.
The microbiologist discovered a new species of bacteria in the soil sample.