chemical barriers


Also found in: Dictionary, Thesaurus, Financial, Encyclopedia.

chemical barriers

1. The chemical characteristics of certain areas of the body that oppose colonization by microorganisms. The acidity of gastric juice, for example, prevents colonization by most disease-causing germs.
2. A contraceptive cream, foam, jelly, or suppository that contains chemical spermicides.
See also: barrier
References in periodicals archive ?
"Our thin films can incorporate active chemical barriers to infectious diseases or harmful agents, such as hazardous waste," said one survey respondent using thin films in the design of medical devices.
New, advanced coating techniques provide better chemical barriers to isolate the workpiece surface.
The current treatment for keeping termites from eating your home and other wooden structures is the barrier method--the insects are kept from the area by chemical barriers in the soil.

Full browser ?