The total amount per unit area of a material suspended in a fluid or in a cloud in space, measured along the length of a column.

(probability theory) probability density function

(medicine) A measure of the amount of mineral in bones, used to estimate the risk of osteoporosis or fractures.

The mass of a particulate material (including voids) in a unit volume

(ecology) Regulation of population growth by mechanisms controlled by the size of the population; especially the curtailment of growth by crowding, predators and competition

(geography) The population density measured as the number of farmers per unit area of arable land

(geography) The population density measured as the number of people per unit area of arable land

(geography, statistics) The population density measured as the number of people per unit area of land

plural of density function

(probability theory) Clipping of probability density function.