microwave linear accelerator(n = noun.artifact) - linear accelerator that uses microwaves;
is a kind of linac, linear accelerator

accelerator, accelerator factor, accelerator pedal, charge-exchange accelerator, cockcroft and walton accelerator, cockcroft-walton accelerator, cosmic microwave background, cosmic microwave background radiation, electron accelerator, induction accelerator, linear, linear a, linear accelerator, linear algebra, linear b, linear equation, linear leaf, linear measure, linear operator, linear perspective, linear programming, linear regression, linear unit, metric linear unit, microwave, microwave bomb, microwave diathermy machine, microwave oven, microwave radar, microwave spectroscopy, microwave spectrum, nautical linear unit, particle accelerator, prothrombin accelerator, proton accelerator