antibody

noun
an·ti·body | \ˈan-ti-ˌbä-dē \

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

Examples of antibody in a Sentence

Recent Examples on the Web

IgM antibiodies are the first antibody produced when you are infected with new bacteria. Andrea K. Mcdaniels, baltimoresun.com, "Ask the expert: With Lyme disease on the rise, here's how you can protect yourself," 3 July 2018 The antibodies hold onto white blood cells, called mast cells and basophils. Maureen Langley, Post-Tribune, "Experts: Indiana's allergy season worse than usual this year," 3 July 2018 Without the antibodies, the CAR T cells become inactive. Bradley J. Fikes, sandiegouniontribune.com, "Scripps Research, AbbVie join in large cancer therapy alliance," 25 June 2018 After a year, 38% of the men were still alive and 11% are still receiving the antibody, because their cancer stopped growing. Ashley May, USA TODAY, "Prostate cancer drug Keytruda shows positive results in a few men during first clinical trial," 4 June 2018 The vaccination helps create an antibody that then passes through the placenta and ideally protects the baby from the bacterium in pertussis that is dangerous for infants, Pan said. Erin Stone, San Francisco Chronicle, "Whooping cough cases on the rise in Alameda County," 14 June 2018 Recipients of regular blood transfusions, like Tymia, build up antibodies to red blood cells. NBC News, "Red Cross seeks more blood with #MissingType campaign," 11 June 2018 The researchers tested 146 local residents and found that 92 of them had antibodies to the leprosy bacteria, suggesting broad exposure. National Geographic, "Humans Gave Leprosy to Armadillos. Now, They’re Giving It Back," 28 June 2018 LeDuc studied Keystone in the 1970s in Texas and developed immune system antibodies to the virus, typically a sign one has been infected. Todd Ackerman, Houston Chronicle, "Texas officials downplay health threat from little-known mosquito-borne virus that caused symptoms in teen," 23 June 2018

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.

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First Known Use of antibody

1894, in the meaning defined above

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Last Updated

3 Oct 2018

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Time Traveler for antibody

The first known use of antibody was in 1894

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More Definitions for antibody

antibody

noun

English Language Learners Definition of antibody

medical : a substance produced by the body to fight disease

antibody

noun
an·ti·body | \ˈan-ti-ˌbä-dē \
plural antibodies

Kids Definition of antibody

: a substance produced by special cells of the body that counteracts the effects of a disease germ or its poisons

antibody

noun
an·ti·body | \ˈant-i-ˌbäd-ē \
plural antibodies

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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