n 1 : a quantity that has magnitude and direction and that is usu. represented by part of a straight line with the given direction and with a length representing the magnitude 2 : an organism (as an insect) that transmits a pathogen from one organism to another <fleas are s of plague> - compare CARRIER1a 3 : a sequence of genetic material (as a transposon or the genome of a bacteriophage) that can be used to introduce specific genes into the genome of an organism vec*to*ri*al adj
, vt, vec*tored vec*tor*ing : to transmit (a pathogen or disease) from one organism to another : act as a vector for <a disease ed by flies> .
Similar sounding terms: fac·tor
Published under license with Merriam-Webster, Incorporated. © 1997-2004.