(Greek: outer, outside, external; used as a prefix)
2. The name of a city or other place used in a foreign language which is not the same at the originating language; such as, Florence (English) for Firenze (Italian).
Additional examples: Londres (French) an exonym for London, Germany (English) is an exonym because Germans use the term Deutschland.
2. A device that humans can wear for greater strength: "The exoskeleton works on a principal of muscle-actuation."
"Built into exoskeletons are a number of pressure points, which, when triggered by even the slightest contact with a person's body, reinforce the movement of the arms, hands, feet, and legs similar to the power steering in cars which make natural rotational movements by the arms and hands with a car's steering wheel much easier."
2. A movement of fluid toward a solution of lower concentration, as is the case when water percolates through a cell membrane into the medium surrounding the cell.
3. The flow of a substance from an area of greater concentration to one of a lower concentration (opposed to endosmosis).
2. An outermost region of the earth's atmosphere, estimated at 300-600 miles, or 500-1000 kilometers, where the density is so low that the mean free path of particles depends upon their direction with respect to the local vertical, being greatest for upward-traveling particles.
Its lower boundary is often called the critical level of escape, where gas atoms are so widely spaced that they rarely collide with one another and have individual orbits or where atmospheric pressure is very low because the gas atoms are very widely spaced and the temperature is very low.