Mosaic

mosaic - 

(1) [remote sensing] A raster dataset composed of two or more merged raster datasets"”for example, one image created by merging several individual images or photographs of adjacent areas.

(2) [visualization] Maps of adjacent areas with the same spatial reference and scale whose boundaries have been matched and dissolved.

[Category=Geospatial ]

Source: esri, 13 June 2012 11:23:20, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation