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Bright :: Bright (a.) Radiating or reflecting light; shedding or having much light; shining; luminous; not dark.

Corona :: Corona (n.) A peculiar phase of the aurora borealis, formed by the concentration or convergence of luminous beams around the point in the heavens indicated by the direction of the dipping needle..

Geissler Tube :: Geissler tube () A glass tube provided with platinum electrodes, and containing some gas under very low tension, which becomes luminous when an electrical discharge is passed through it; -- so called from the name of a noted maker in germany. It is called also Plucker tube, from the German physicist who devised it..

Dextrorotatory :: Dextrorotatory (a.) Turning, or causing to turn, toward the right hand; esp., turning the plane of polarization of luminous rays toward the right hand; as, dextrorotatory crystals, sugars, etc. Cf. Levorotatory..

Eclipse :: Eclipse (n.) An interception or obscuration of the light of the sun, moon, or other luminous body, by the intervention of some other body, either between it and the eye, or between the luminous body and that illuminated by it. A lunar eclipse is caused by the moon passing through the earth's shadow; a solar eclipse, by the moon coming between the sun and the observer. A satellite is eclipsed by entering the shadow of its primary. The obscuration of a planet or star by the moon or a planet, thoug

Scioptics :: Scioptics (n.) The art or process of exhibiting luminous images, especially those of external objects, in a darkened room, by arrangements of lenses or mirrors..

Meteor :: Meteor (n.) Specif.: A transient luminous body or appearance seen in the atmosphere, or in a more elevated region..

Light :: Light (n.) That agent, force, or action in nature by the operation of which upon the organs of sight, objects are rendered visible or luminous..

Dusky :: Dusky (a.) Partially dark or obscure; not luminous; dusk; as, a dusky valley..

Clay :: Clay (n.) A soft earth, which is plastic, or may be molded with the hands, consisting of hydrous silicate of aluminium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities..

Macula :: Macula (n.) A spot, as on the skin, or on the surface of the sun or of some other luminous orb..

Luminous :: Luminous (a.) Illuminated; full of light; bright; as, many candles made the room luminous..

Lustrous :: Lustrous (a.) Bright; shining; luminous.

Photopsia :: Photopsia (n.) An affection of the eye, in which the patient perceives luminous rays, flashes, coruscations, etc. See phosphene..

Incandescent :: Incandescent (a.) White, glowing, or luminous, with intense heat; as, incandescent carbon or platinum; hence, clear; shining; brilliant..

Crepusculous :: Crepusculous (a.) Pertaining to twilight; glimmering; hence, imperfectly clear or luminous..

Fire Beetle :: Fire beetle () A very brilliantly luminous beetle (Pyrophorus noctilucus), one of the elaters, found in Central and South America; -- called also cucujo. The name is also applied to other species. See Firefly..

Shiny :: Shiny (superl.) Bright; luminous; clear; unclouded.

Clear :: Clear (superl.) Free from opaqueness; transparent; bright; light; luminous; unclouded.

Accidental :: Accidental (n.) Those fortuitous effects produced by luminous rays falling on certain objects so that some parts stand forth in abnormal brightness and other parts are cast into a deep shadow.

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