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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states

phenomenon go
any state or process known through the senses rather than by intuition or reasoning

natural phenomenon go
all phenomena that are not artificial

physical phenomenon go
a natural phenomenon involving the physical properties of matter and energy

pressure, pressure level, force per unit area
the force applied to a unit area of surface

noun.phenomenon

11 Subcategories

blood pressure go
the pressure of the circulating blood against the walls of the blood vessels
gas pressure go
the pressure exerted by a gas
head go
the pressure exerted by a fluid
hydrostatic head go
the pressure at a given point in a liquid measured in terms of the vertical height of a column of the liquid needed to produce the same pressure
intraocular pressure, IOP go
pressure exerted by the fluids inside the eyeball
oil pressure go
pressure that keeps oil on the moving parts of an internal-combustion engine
osmotic pressure go
(physical chemistry) the pressure exerted by a solution necessary to prevent osmosis into that solution when it is separated from the pure solvent by a semipermeable membrane
radiation pressure, corpuscular-radiation pressure go
the minute pressure exerted on a surface normal to the direction of propagation of a wave
sound pressure, instantaneous sound pressure go
the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point
suction go
a force over an area produced by a pressure difference
vapor pressure, vapour pressure go
the pressure exerted by a vapor