0 a piece of white clothing that is worn over other clothes to protect them by a scientist, doctor, or other person working in a place where scientific tests are done, or working with chemicals, medicines, etc.:
Lab crews in white coats, latex gloves and masks are hunched over Petri dishes and microscopes hunting for anthrax.
In strides a doctor in white coat and stethoscope.
"White coats scare kids," says Biasotto, who says many of his colleagues don't wear lab coats, either.
