Related Words

Melting Level: The altitude at which ice crystals and snow flakes melt as they descend through the atmosphere.

Mean Water Level Line (MWLL): The line on a chart or map which represents the intersection of the land with the water surface at the elevation of mean water level.

Mean Water Level (MWL): A datum. The mean surface elevation as determined by averaging the heights of the water at equal intervals of time, usually hourly. Mean water level is used in areas of little or no range in tide.

Melting Point: The temperature at which a solid substance undergoes fusion, changing from a solid to a liquid state. Contrast with freezing point.

Mezzanine Level: The period in a company's development just before it goes public.

National Water Level Observation Network (NWLON): The network of tide and water level stations operated by the National Ocean Service along the marine and Great Lakes coasts and islands of the United States. The NWLON is composed of the pri . . . View Full Definition

Minimal Risk Level (MRL): An ATSDR estimate of daily human exposure to a hazardous substance at or below which that substance is unlikely to pose a measurable risk of harmful (adverse), noncancerous effects. MRLs are . . . View Full Definition

Mean Tide Level (MTL): A tidal datum. The arithmetic mean of mean high water and mean low water. Same as half-tide level.

Mean Sea Level (MSL): A tidal datum. The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; e.g., monthly mean sea level and yearly mean sea level.

Low Level Jet (LLJ): Strong winds that are concentrated in relatively narrow bands in the lower part of the atmosphere. It is often amplified at night. The southerly wind over the US Plains states during spring . . . View Full Definition