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ENGLISH · A WORD WITH POSSIBILITIES

vaccine.

Of, pertaining to, caused by, or characteristic of cowpox.

7 characters2 syllables approx.English language

Meaning & usage

adj/vækˈsin/General-American/ˈvækˌsin/General-American
  1. Of, pertaining to, caused by, or characteristic of cowpox.

    historical · not-comparable
  2. Of or pertaining to cowpox as a source of material for vaccination against smallpox; also, of or pertaining to such material used for vaccination.

    historical · not-comparable
  3. Of, pertaining to, or derived from cattle.

    archaic · not-comparable
Where this word comes from

Learned borrowing from Latin vaccīnus (“of or derived from a cow”), from vacca (“cow (female cattle)”) + -īnus (suffix meaning ‘of or pertaining to’ forming adjectives). Sense 1 refers to the early use of the cowpox virus as a vaccination against smallpox: see New Latin variolae vaccīnae (“cowpox”, plural, literally “infectious diseases of cattle causing pustules”), coined by the British physician and scientist Edward Jenner (1749–1823).

noun/vækˈsin/General-American/ˈvækˌsin/General-American
  1. A substance given to stimulate a body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment, prepared from the agent that causes the disease (or a derivative of it; or a related, also effective, but safer disease), or a synthetic substitute; also, a dose of such a substance.

    countable · uncountable
  2. The process of vaccination; immunization, inoculation.

    countable · uncountable
    My dog has had two vaccines this year.
  3. The material taken from cowpox pustules used for vaccination against smallpox.

    countable · historical · uncountable
  4. The disease cowpox, especially as a source of material for vaccination against smallpox.

    also · countable · obsolete · uncountable
  5. Something defensive or protective in nature, like a vaccine (sense 1.1).

    countable · figuratively · uncountable
  6. A software program which protects computers against, or detects and neutralizes, computer viruses and other types of malware; an antivirus.

    countable · figuratively · uncountable
Where this word comes from

The noun is probably partly: * derived from vaccine (adjective) (see etymology 1); and * borrowed from French vaccine (“cowpox (short for variole vaccine); vaccination against smallpox using material from cowpox”), vaccin (“cowpox material used for smallpox vaccination”), both noun uses of vaccin (adjective), from Latin vaccīnus (see etymology 1). The verb is derived from the noun. Cognates * Italian vaccina * Portuguese vacina * Spanish vacuna

verb/vækˈsin/General-American/ˈvækˌsin/General-American
  1. Synonym of vaccinate (“to treat (a person or an animal) with a vaccine to produce immunity against a disease”).

    archaic · transitive
Where this word comes from

The noun is probably partly: * derived from vaccine (adjective) (see etymology 1); and * borrowed from French vaccine (“cowpox (short for variole vaccine); vaccination against smallpox using material from cowpox”), vaccin (“cowpox material used for smallpox vaccination”), both noun uses of vaccin (adjective), from Latin vaccīnus (see etymology 1). The verb is derived from the noun. Cognates * Italian vaccina * Portuguese vacina * Spanish vacuna

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.