English to English
1. a variable quantity that can be resolved into components
2. a straight line segment whose length is magnitude and whose orientation in space is direction
3. any agent (person or animal or microorganism) that carries and transmits a disease
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
5. Same as Radius vector.