photo-, phot-, -photic
(Greek: light; ultraviolet and infrared radiation; radiant energy)
A fluoroscope is an instrument for visual observation of the body by means of x-rays.
The patient is put into position with the part to be viewed placed between an x-ray tube and a fluorescent screen. X-rays from the tube pass through the body and project the bones and organs as images on the screen.
The advantage of the fluoroscope is that the action of joints, organs, and entire systems of the body can be observed directly.
2. Concerning an abnormally heightened reactivity to sunlight: Some of the plants in the sun room were photosensitive to the sunshine that poured through the windows in the morning.
The layer of the sun that corresponds to the solar surface viewed in white light or the region from which light escapes from the sun into space.
2. The intensely bright gaseous outer layer of a star, especially the sun.Sunspots and faculae are both features of the photosphere. The faculae are groups of small shining spots on the surface of the sun which are brighter than the other parts of the photosphere.
2. The production of organic substances, primarily sugars, from carbon dioxide and water which occur in green plant cells.
3. The fundamental chemical process in which green plants (and certain other organisms) utilize the energy of sunlight or other light to convert carbon dioxide and water into organic chemical energy.
Photosynthesis is often described as the most important chemical reaction on earth and is found in bacteria, cyanobactria, algae, and most plants.
The coupling of light energy to chemical energy is, directly or indirectly, the basis for nearly all life on earth.
"From sea slugs to salamanders, many animals can naturally tap into solar power"
There are plenty of free-living photosynthetic animals; including photosynthetic flatworms up to 15 millimetres long that can be found in huge numbers in places.
Then there are the jellyfish-like Vellela, which float on the sea surface, and the upside-down jellyfish. Most striking of all are the many different kinds of solar-powered sea slugs.
2. Taxis of an organism elicited in response to the source of a light stimulus.
3. In botany, the movement of a part of a plant toward or away from light sources.
Etymologically related "light, shine, glow" word families: ethero-; fulg-; luco-; lumen-, lum-; luna, luni-; lustr-; phengo-; pheno-; phospho-; scinti-, scintill-; splendo-.