scientific community; world of science
Refers to the collective body of scientists, researchers, and institutions, or the domain of scientific activity.
The discovery sent shockwaves through the scientific community.
He is widely known in the world of science.
科学者 refers to an individual scientist, whereas 科学界 refers to the community or sphere as a whole.
Compound of 科学 (science) and 界 (world, circles).