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Definition of antibody

antibody

/ˈæn.tɪˌbɑː.di/
an · ti · bod · y
Plural:antibodies
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antibody Lexical Profile

antibody Game Scores & Validity

• noun

1

A specialized Y-shaped blood protein produced by the immune system in response to and counteracting a specific foreign substance, such as a virus, bacterium, or toxin.

Example

"A simple blood test can determine whether a patient has developed the specific antibodies needed to fight off the infection."

Synonyms
View all synonyms for antibody
Antonyms
View all antonyms for antibody

Word Nuance & Usage

Do not confuse 'antibody' (a defensive protein produced by the immune system) with 'antigen' (the foreign substance or toxin that triggers the immune response) or 'antibiotic' (a medication used to treat bacterial infections).

• Rhymes for antibody

• Nearby Words

antibias
antibiotic
antiblack
antibody
antibusiness
antic
anticaking

Word Origin & Etymology

Coined in 1901 as a loan translation of the German term Antikörper, introduced by German immunologist Paul Ehrlich.

Cite this Entry

Wordmom. (2026). Definition of Antibody. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/antibody
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