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.
1. of or having one color. 2. of, pertaining to, or having tones of one color in addition to the ground hue: monochromatic pottery. 3. pertaining to light of one color or to radiation of a single wavelength or narrow range of wavelengths. 4. of or pertaining to monochromatism.