The amount of any quantity per unit volume. The mass density is the
mass per unit volume. The energy density is the energy per unit
volume; particle density is the number of particles per unit volume.
See also:
→ charge density,
→ column density,
→ critical density,
→ current density,
→ density fluctuation,
→ density parameter,
→ density profile,
→ density wave,
→ density-bounded H II region,
→ density-wave theory,
→ electron density,
→ energy density,
→ flux density,
→ magnetic flux density,
→ maximum density of water,
→ neutral density filter,
→ nuclear density,
→ number density,
→ optical density,
→ period-mean density relation,
→ Planck density,
→ potential density,
→ power spectral density,
→ probability density function,
→ radio flux density,
→ relative density,
→ specific density,
→ spectral density,
→ surface density.
See also: Noun form of → dense.
