(botany) the stage of photosynthesis during which light energy is absorbed by chlorophyll and transformed into chemical energy stored in ATP Compare dark reaction
Any of the chemical reactions that take place during the first stage of photosynthesis and require the presence of light. During the light reactions, energy captured from light by chlorophyll and its accessory pigments drives the production of ATP, the source of energy that is later used to drive the production of carbohydrates. Compare dark reaction. See more at photosynthesis.
- Light sculpture
noun a three-dimensional piece of art that uses light bulbs, the sun, or another light source as the primary medium of expression Examples This hanging light sculpture looks interesting from any angle, and makes nice shadows.
[lahyt-ship] /ˈlaɪtˌʃɪp/ noun 1. a anchored in a specific location and displaying or flashing a very bright for the guidance of ships, as in avoiding dangerous areas. Abbreviation: LS. /ˈlaɪtˌʃɪp/ noun 1. a ship equipped as a lighthouse and moored where a fixed structure would prove impracticable
[lahyt-suh m] /ˈlaɪt səm/ adjective 1. light, especially in form, appearance, or movement; airy; buoyant; agile; nimble; graceful. 2. cheerful; gay; lighthearted. 3. frivolous; changeable. [lahyt-suh m] /ˈlaɪt səm/ adjective 1. emitting or reflecting light; luminous. 2. well-lighted; illuminated; bright. /ˈlaɪtsəm/ adjective (archaic or poetic) 1. lighthearted 2. airy or buoyant 3. not serious; frivolous […]
noun 1. Chiefly Military. a signal, usually by drum or bugle, that all or certain camp or barracks lights are to be extinguished for the night. 2. . [lahyt] /laɪt/ verb (used without object), lighted or lit, lighting. 1. to get down or descend, as from a horse or a vehicle. 2. to come to […]