http://www.physicalgeography.net/physgeoglos/m.html meridian Movement metabolic Meridional Mammal http://www.physicalgeography.net/physgeoglos/m.html maps Marine http://www.physicalgeography.net/physgeoglos/m.html Mercator projection Mesophyte matter Multispectral Scanners matter Mudflow mid-latitude cyclone map projections microwave radiation map scale map meridian meridians mid-oceanic ridges http://www.physicalgeography.net/physgeoglos/m.html Military Grid Reference System matter Miller Cylindrical projection molecules http://www.physicalgeography.net/physgeoglos/m.html Magma http://www.physicalgeography.net/physgeoglos/m.html Mollweide projection http://www.physicalgeography.net/physgeoglos/m.html