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|Noun||1.||pressure level - the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit); "the compressed gas exerts an increased pressure"|
physical phenomenon - a natural phenomenon involving the physical properties of matter and energy
blood pressure - the pressure of the circulating blood against the walls of the blood vessels; results from the systole of the left ventricle of the heart; sometimes measured for a quick evaluation of a person's health; "adult blood pressure is considered normal at 120/80 where the first number is the systolic pressure and the second is the diastolic pressure"
gas pressure - the pressure exerted by a gas
head - the pressure exerted by a fluid; "a head of steam"
hydrostatic head - 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 - pressure exerted by the fluids inside the eyeball; regulated by resistance to the outward flow of aqueous humor; "glaucoma can result from increased intraocular pressure"
oil pressure - pressure that keeps oil on the moving parts of an internal-combustion engine
osmotic pressure - (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
corpuscular-radiation pressure, radiation pressure - the minute pressure exerted on a surface normal to the direction of propagation of a wave
instantaneous sound pressure, sound pressure - the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point
suction - a force over an area produced by a pressure difference