Vector

As the electric field is defined in terms of force, and force is a vector, so it follows that an electric field is also a vector, having both magnitude and direction. Specifically, it is a vector field.[34] ...

Acceleration: Rate of change of velocity, either scalar or vector.

or bomb); any weapon that is designed or intended to cause death or serious bodily injury through the release, dissemination, or impact of toxic or poisonous chemicals, or their precursors; any weapon involving a biological agent, toxin, or vector...

See also: Will, Wrong, Were, Wreck, Witness