a variable quantity that can be resolved into components
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"
a straight line segment whose length is magnitude and whose orientation in space is direction
(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
a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer; "a true virus cannot spread to another computer without human assistance"
a harmful or corrupting agency; "bigotry is a virus that must not be allowed to spread"; "the virus of jealousy is latent in everyone"
(genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring
a rack attached to a vehicle; for carrying luggage or skis or the like
a self-propelled wheeled vehicle designed specifically to carry something; "refrigerated carriers have revolutionized the grocery business"
a person or firm in the business of transporting people or goods or messages
(medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others
a boy who delivers newspapers
someone whose employment involves carrying something; "the bonds were transmitted by carrier"
an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction
a preliminary election where delegates or nominees are chosen
one of the main flight feathers projecting along the outer edge of a bird's wing
not derived from or reducible to something else; basic; "a primary instinct"
of first rank or importance or value; direct and immediate rather than secondhand; "primary goals"; "a primary effect"; "primary sources"; "a primary interest"