radio-, radi-, rad- (Latin: ray, radiating [the Latin word for the spokes of a wheel is radius])

irradiance:

irradiant:

irradiate:

radial:

radian:

radiance:

radiant:

radiate:

radiation:

radiator:

radiesthesia:

radii (plural),

radio (short for radiotelegraphy):

radioactivity:

radioautograph:

radiobiologist:

radiobiology:

radiocardiography:

radiodermatitis:

radiodontist:

radiograph:

radiologist:

radiology:

radiolucent:

radiometer:

radiomicrometer:

radionecrosis:

radiophobia:

radiophone:

radioplastic:

radiopraxis:

radioscope:

radioscopy:

radiosensibility:

radiosensitive:

radiosurgery:

radiothanatology:

radiotherapeutics:

radiotherapist:

radiothermy:

radiotropism:

radium:

radius (singular):

ray:

Rayon (French for ray):


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