Antigen is the medical term meaning foreign substance.
The medical term for a foreign substance is "antigen." An antigen is any substance that the immune system identifies as foreign and triggers an immune response.
A foreign substance is a substance that doesn't belong somewhere. A piece of glass or splinter is a foreign substance that people get in their body.
Answer is Pulmonary Embolism.
Keratin
antibiotic
Soporific is the medical and common term meaning pertaining to something that produces sleep.
A heterologous protein; however, any abnormal substance (bacteria, viruses, cancer cells) in the body is called an antigen
A pathogen is a foreign body, bacteria, or virus.
Allergen
It is called bilirubin.
A carcinogen is a cancer causing substance.Carcinogen
"Placebo". Alternatively, "homeopathy".
"Antibody" is the medical term meaning immunity protein. When your body is presented with a foreign protein, the immune system makes antibodies against that protein.