Definition of antibody
: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains —called also immunoglobulin
Recent Examples of antibody from the Web
Karen’s blood work showed signs that antibodies were attacking the proteins in the nuclei of her cells.
Those cells, however, also make antibodies that fight off other diseases.
Hill and colleagues treated 48 transplant patients with tocilizumab, a monoclonal antibody approved to treat rheumatoid arthritis that blocks the IL-6 receptor on cell surfaces.
But most tests rely on antibodies that bind fungal proteins or reading nucleic acids to identify fungi by their genes, thus requiring sterile labs and refrigerated reagents that doctors and farmers in developing countries often don’t have access to.
But researchers have also found that breastfeeders end up with higher levels of special antibodies to a protein found in ovarian cancer cells.
Those who developed more Alpha-Gal antibodies from more exposure to ticks saw the most serious symptoms.
A woman in her 60s with a low white blood cell count and degenerative arthritis received intravenous immunoglobulin, or antibodies, every three weeks for more than 10 years.
The vaccine causes antibodies to quickly mobilize and sequester heroin and its psychoactive products in rhesus monkeys.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'antibody.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of antibody
ANTIBODY Defined for English Language Learners
Definition of antibody for English Language Learners
medical : a substance produced by the body to fight disease
ANTIBODY Defined for Kids
Definition of antibody for Students
: a substance produced by special cells of the body that counteracts the effects of a disease germ or its poisons
Medical Definition of antibody
: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains—called also immunoglobulin
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