Drainage basin. Example of a drainage basin. The dashed line is the main water divide of the hydrographic basin. A drainage basin or catchment area is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water.
Word Origin and History for monochrome Expand. n. 1660s, painting or drawing done in different tints of a single color, from Greek monochromos of a single color, from monos single, alone (see mono-) + khroma (genitive khromatos) color, complexion, skin (see chroma). As an adjective from 1849. Photographic sense is recorded from 1940.
Black and white, often abbreviated B/W or B&W, and hyphenated black-and-white when used as an adjective, is any of several monochrome forms in visual arts. Black-and-white images are not usually starkly contrasted black and white. They combine black and white in a continuum producing a range of shades of gray. Further, many prints, especially those produced earlier in the development of photography, were in sepia (mainly for archival stability), which yielded richer, subtler shading than reproductions in plain black-and-white.