actino-, actin-, actini-, -actinal, actis- +
(Greek: ray [as of light] or like a ray in form; radiance, radiation; a radiating or tentacled structure)
2. An instrument (of which there are various kinds) used for recording actinic power of light, to determine the correct time of exposure for photographic plates.
3. Either seldom used terms, or obsolete terms, for radiograph and radiography (images produced on film or another sensitive surface by radiation; such as, X-rays or gamma rays passing through an object).
Amphibole refers to a hydrous silicate mineral containing varying amounts of aluminum, calcium, iron, magnesium, and sodium
Amphibole is any of a complex group of hydrous silicate minerals, containing chiefly calcium, magnesium, sodium, iron, and aluminum, and including hornblende, tremolite, asbestos, etc., occurring as important constituents of many rocks.
2. The study of radiant energy.
3. The study of homology of successive regions, segments, or parts of a radially symmetric organ or organism radiating from a common central region.
2. Any substance which undergoes a rather marked change when exposed to light.
2. A device for measuring light energy; especially, solar and terrestrial radiation.
3. An instrument for measuring the intensity of radiation by measuring the fluorescence prodced by it.
2. A device which determines the degree of penetration of such rays.
2. A reference to any of several radiometric instruments; such as, a pyrheliometer, used chiefly for meteorological measurements of terrestrial and solar radiation.
2. Measurement of solar energy.