A variable quantity that can be resolved into components.
A straight line segment whose length is magnitude and whose orientation in space is direction.
Any agent (person or animal or microorganism) that carries and transmits a disease. Synonym:transmitter."Fleas are vectors of the plague" , "Aphids are transmitters of plant diseases" , "When medical scientists talk about vectors they are usually talking about insects"
(genetics) a virus or other agent that is used to deliver DNA to a cell.