a compound prism that spreads out incident white light into a spectrum but produces no deviation of the central color of the dispersed beam.
noun 1. a black rat, Rattus rattus alexandrinus, often found on the upper floors of buildings in warm areas.
noun, plural roofs. 1. the external upper covering of a house or other building. 2. a frame for supporting this: an open-timbered roof. 3. the highest part or summit: The Himalayas are the roof of the world. 4. something that in form or position resembles the roof of a house, as the top of a […]
noun 1. a view of the rooftops of a town, city, etc
noun 1. the roof of a building, especially the outer surface. noun 1. the outside part of the roof of a building 2. shout from the rooftops, to proclaim (something) publicly see: shout from the rooftops