photo-, phot-, -photic +
(Greek: light; ultraviolet and infrared radiation; radiant energy)
aphotesthesia
1. Decreased sensitivity of the retina to light caused by excessive exposure to sunlight.
2. A condition caused by an undue exposure to sunlight.
It is characterized by reduced retinal sensitivity to light.
aphotic
1. A description of those parts of the ocean that are not reached by sunlight, or plants that grow there without photosynthesizing.
2. A reference to any environement or habitat that has no sunlight of biological significant intensity.
3. Literally, no light.
aphototaxis, aphototactic
The absence of any directed response to a light stimulus in a motile organism; negative phototaxis.
aphototropism, aphototropic
1. An orientation response away from light; negative phototropism.
2. The absence of an orientation response to light.
astrophotograph
Photography as used in astronomical investigations.
astrophotographer
Someone who specializes in a type of photography that entails making photographs of astronomical objects in the night sky; such as, planets, stars, and deep sky objects including star clusters and galaxies.
astrophotography
1. The art of photographing astronomical objects and events for astronomical studies>
2. The photography of stars and other celestial objects.
3. The use of photographs to record extraterrestrial objects in order to study their surface features, positions, motions, radiation, and spectra.
astrophotometer
1. A photometer (light meter) for measuring the brightness of stars.
2. The measurement of the intensity of light of celestial objects.
astrophotometrical
Relating to the measurement of the intensity of light of celestial objects.
bathyphotometer
An instrument for detecting photoluminescent signals in marine environments.
The system uses photodiodes to convert the optical signals into electrical signals which are sampled, integrated, and coupled to output terminals for transmission to a surface host vehicle.
Here is more information about bathyphotometry.
biophotogenesis
The production and emission of light by plants or by animals; bioluminescence.
biophotolysis; biohydrogen
1. The hypothetical process of splitting water by solar energy to produce hydrogen.
2. The action of light on a biological system; such as, certain algae and bacteria, that results in the dissociation of water to produce hydrogen.
biophotometer
An obsolete instrument once used for measuring the rate and degree of dark adaptation, as in vitamin "A" deficiency.
chronophotograph
A photograph taken as one of a series for the purpose of showing successive phases of a motion.
chronophotography
An early term for cinematic photography.
Etymologically related "light, shine, glow" word families:
ethero-;
fulg-;
luco-;
lumen-, lum-;
luna, luni-;
lustr-;
phengo-;
pheno-;
phospho-;
scinti-, scintill-;
splendo-.
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