radio-, radi-, rad-

(Latin: ray, radiating [the Latin word for the spokes of a wheel is radius]; spoke, staff, rod)

involuntary euthanasia
Euthanasia performed without the consent of a competent person.
irradiance, radiant flux density
1. A radiometric term for the rate at which radiant energy is transferred across a unit area of a surface, commonly measured in watts per square meter.
2. A radiometric term for the rate at which radiant energy in a radiation field is transferred across a unit area of a surface (real or imaginary) in a hemisphere of directions.

In general, irradiance depends on the orientation of a surface. The radiant energy may be confined to a narrow range of frequencies (spectral or monochromatic irradiance which is characterized by a single frequency) or integrated over a broad range of frequencies.

irradiant
Irradiating, shining, or illuminating; as, the irradiant moon.
irradiate (verb), irradiates; irradiated; irradiating
1. To expose someone to or to treat something with radiation or streams of particles.
2. To treat food with electromagnetic radiation or to kill microorganisms and slow down the process of ripening and gradual deterioration or rotting.
3. To make something brighter by shining light onto it.
4. To make something intellectually clear.
5. Etymology: "to cast beams of light upon"; from Latin irradiatus, irradiare, "to shine forth"; from in-, "into, in" + radiare, "to shine".
radial
radian
radiance
radiate
radiation
radiator
radiesthesic (adjective), more radiesthesic, most radiesthesic
Relating to the detection of and diagnosing of a disease by the passing of one's hands over a body: The radiesthesic skills of the renowned teacher, Mr. Cooke, were well-known and often discussed by his disciples.
radio, radiotelegraphy
1. The use of electromagnetic waves to transmit and receive information, as in sound broadcasts or two-way communication, without the need for connecting wires.
2. Communication that takes place by means of radio waves.
3. An electronic device for receiving sound broadcasts transmitted via radio signals.
4. An electronic device used to send and receive radio signals, used for two-way communication.
5. Sound broadcasts transmitted by means of radio waves.
6. The broadcasting by radio of programs (news, music, talk shows, etc.) for the public.
7. Radio broadcasting as an industry or profession.
radioactivity
radioautograph
An image recorded on a photographic film or plate produced by the radiation emitted from a specimen; such as, a section of tissue, that has been treated or injected with a radioactively labeled isotope or which has absorbed or ingested such an isotope.
radiobiologist
An expert in radiobiology or the branch of science concerned with effects of light and of ultraviolet and ionizing radiations on living tissues or organisms.