vector

nouns

a variable quantity that can be resolved into components
is a type of (narrower)
a quantity that can assume any of a set of values
a straight line segment whose length is magnitude and whose orientation in space is direction
is a type of (narrower)
a line traced by a point traveling in a constant direction; a line of zero curvature
"the shortest distance between two points is a straight line"
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"
(genetics) a virus or other agent that is used to deliver DNA to a cell
domain category
the branch of biology that studies heredity and variation in organisms
is a type of (narrower)
(virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein