This is the 10193rd most frequent Russian word.
биолог
Biologist.
The word 'биолог' is used as a noun to indicate someone's profession in the field of biology.
Мой брат работает биологом в лаборатории.
My brother works as a biologist in a laboratory.
The word 'биолог' in plural form 'биологи' refers to a group of people specialized in biology.
На конференции биологи обсудили новые методы исследования.
At the conference, biologists discussed new research methods.
The word 'биолог' is in genitive singular form to denote the profession and is connected with a descriptive requirement.