散逸層

exosphere

variant of 散[san4]

scattered / loose / to come loose / to fall apart / leisurely / powdered medicine

to scatter / to break up (a meeting etc) / to disperse / to disseminate / to dispel / (coll.) to sack

dispersal

to escape / leisurely / outstanding

to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers