Antibody

//ˈæn.tiˌbɒd.i// noun

noun ·Moderate ·College level

Definitions

Noun
  1. 1
    A protein produced by B-lymphocytes that binds to a specific antigen.

    "It’s estimated only 0.1% of antibodies circulating in the bloodstream enter the brain – this also includes the therapeutic antibodies currently used in clinical trials. An approach my team is taking is to use ultrasound to temporarily open the blood-brain barrier, which increases the uptake of Alzheimer’s drugs or antibody fragments."

  2. 2
    any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response wordnet

Example

More examples

"Each antibody targets a specific bacteria or virus."

Etymology

From anti- + body, a calque of German Antikörper.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.