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.
Define mono-. mono- synonyms, mono- pronunciation, mono- translation, English dictionary definition of mono-. or mon- pref. 1. One; single; alone: monomorphic. 2. Containing a single atom, radical, or group: monobasic. 3. Monomolecular; monatomic: monolayer.