The act of swallowing something through eating, drinking, or mouthing objects. A hazardous substance can enter the body this way [see route of exposure].
Source: ATSDR  Glossary of Terms

The term "ingestion" was found in the following pages:

California proposes new hexavalent chromium standard for drinking water | EVISA's News
Nanoparticles - a target for speciation analysis | EVISA's News
Link database: Human Metabolome Database: Tellurium
Scientific journal adds fuel to ongoing chromium debate | EVISA's News
Link database: National Research Council: Arsenic in Drinking Water
Widespread Occurrence of the Highly Toxic Dimethylated Monothioarsenate in Rice | EVISA's News
Methylmercury in European rice varies by more than a factor of 50 | EVISA's News
Speciation and Toxicity | EVISA's News
Arsenic species in rice: Origin, uptake and geographical variation | EVISA's News
Oral ingestion of hexavalent chromium through drinking water and cancer mortality | EVISA's News
Journals database: Physiology & behavior
Link database: CODA-CERVA: Lead
EU wide human monitoring study on occupational exposure to hexavalent chromium | EVISA's News
The human liver: not always doing the job right? | EVISA's News
Canada finalises environmental guideline for hexavalent chromium | EVISA's News
Thermo Fisher Scientific Collaborates with US EPA to Improve Holding Time and MDLs for Chromate in Drinking Water | EVISA's News
China: Inorganic Arsenic in Rice - An Underestimated Health Threat ? | EVISA's News
Toxic inorganic arsenic species found in Japanese seaweed food | EVISA's News
Inorganic Mercury Level in US Women increases | EVISA's News
FDA Lands in Court Over Mercury in Fish | EVISA's News