the minute pressure exerted on a surface normal to the direction of propagation of a wave
energy that is radiated or transmitted in the form of rays or waves or particles
the act of spreading outward from a central source
the spread of a group of organisms into new habitats
the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)
the act of pressing; the exertion of pressure
the state of demanding notice or attention
the somatic sensation that results from applying force to an area of skin
to cause to do through pressure or necessity, by physical, moral or intellectual means :"She forced him to take a job in the city"
