vector

Noun
  1. A variable quantity that can be resolved into components (synset 105873161)
  2. A straight line segment whose length is magnitude and whose orientation in space is direction (synset 113936278)
  3. Any agent (person or animal or microorganism) that carries and transmits a disease (synset 109492415)
    "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects"
  4. (genetics) a virus or other agent that is used to deliver DNA to a cell (synset 101374679)

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