harmful

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This is where our growing obsession with achieving optimal sleep—an issue that researchers call orthosomnia—becomes harmful.

From The Wall Street Journal

This tightly packed network of blood vessels normally shields the brain from harmful substances circulating in the bloodstream.

From Science Daily

"Our findings suggest that individuals with a history of stroke may be particularly vulnerable to the harmful effects of air pollution on brain health, highlighting an important intersection between environmental and vascular risk factors."

From Science Daily

A sweeping new investigation by the Silent Spring Institute has found dozens of potentially harmful chemicals in widely sold hair extensions, including those made from human hair.

From Science Daily

It lowers their yields and also sometimes kills young animals but is not harmful to humans.

From BBC