number of people or things in a particular area

plural of density

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

(probability theory) probability density function

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

mass per unit length

(physics) The unit of density in the system of Planck units, equal to one Planck mass in one Planck volume.

A measure of the number of characters that are represented in a specified unit of text stream. / The number of strokes required to form a Chinese character.

The mass of any given substance contained in unit volume.