disease or disability resulting from conditions of employment (usually from long exposure to a noxious substance or from continuous repetition of certain acts)
a chemical substance derivable from a mold or bacterium that kills microorganisms and cures infections; "when antibiotics were first discovered they were called wonder drugs"
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