Density: The ratio of the mass of a substance to the volume it occupies. In oceanography, it is equivalent to specific gravity and represents the ratio of the weight of a given volume of sea water to that of an equal volume of distilled water at 4.0°C or 39.2°F.

 

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Density: The ratio of the mass of a substance to the volume it occupies. In oceanography, it is equivalent to specific gravity and represents the ratio of the weight of a given volume of sea water to . . . View Full Definition

Density Functional: A model that describes the electronic structure of an atom or molecule by approximating the total energy as a function of electron density.

Density-Dependent Factors: Factors, such as resource availability, that vary with population density

Density Current: A gravity-driven flow of dense water down an underwater slope. The increased density of the water is a result of a temperature difference, increased salinity or suspended sediment load.

Keyword Density: An old measure of search engine relevancy based on how prominent keywords appeared within the content of a page. Keyword density is no longer a valid measure of relevancy over a broad open s . . . View Full Definition

Density Altitude: The altitude at which a given density is found in the standard atmosphere. Used in aviation, it is computed from the station pressure at takeoff and the virtual temperature at the particular . . . View Full Definition

Background Density: Density of any selection of a negative or print on which there is no image. Also referred to as fog level.

High-Density Lipoproteins (HDL): Known as High-Density Lipoproteins that has a function to remove cholesterol from the blood, carrying it to the liver. Often called good cholesterol.

Bone Density: Soundness of the bones within the body, low density can be a result of osteoporosis.

Magnetic Flux Density: The measurement of magnetic flux, in units of Gauss, inside the air gap in which a voice coil of a speaker operates.