Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

passive immunity

 
/ˈpæs·ɪv ɪˈmyu·nɪ·ti/ n [U]

Definition

biology protection against disease in the form of antibodies (= substances in the blood that fight disease) that come from someone else, for example, from the mother's milk
(Definition of passive immunity n from the Cambridge Academic Content Dictionary © Cambridge University Press)

Word of the Day

everything under the sun

everything that exists or is possible

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More