While these odors do not cause a health threat at low concentrations, they are undesirable.

But eliminating odors may cause more trouble than it solves, say scientists studying the human sense of smell.

Quite a few of the cerebral-allergy patients in my hospital clinical ecology unit were unable to detect the odors causing their distress.

They walked along the side of a hill among pine-trees, and their pleasant odour caused Philip a keen delight.

However, all of these products have common side effects: namely, an offensive odour, and the ability to cause, among other things, skin cancer.

This bad odours caused digestive and psychological problems.

Brayduck lit his pipe and the odor of the tobacco caused Ellis to look at the man once again.

The odor of vomit caused George to gag too.

This chemical can be degraded by molds to produce 2,4,6-tribromoanisole whose strong, musty odor caused consumers to complain.

Have persistent bad odor or taste in the mouth, which is caused by tonsillitis that does not respond to antibiotics.