exo
Not inside prefix
Exo is a prefix meaning outside or external, from Greek.
It appears in scientific terms like exoskeleton (an external skeleton), exoplanet (a planet outside our solar system), and exothermic (releasing heat outward).
In casual use, exo sometimes stands alone as shorthand for anything external or alien: The exo team handles outside vendors.
External skeletal structure
Relating to distant worlds
- orbitalRevolving around another
- spaceUnoccupied area or interval
- celestialOf the sky above
- externalLocated on outside
exterior · outward · peripheral · surface · shell · atmospheric · boundary
Being from outer space
- offworlderPerson from another planet
- nonterrestrialNot of Earth
- spacefarerOne traversing the cosmos
- martianNative of fourth planet
xenomorph · otherworldly · lifeform · astrobiology · interstellar · cosmic · grey · reptilian
exoskeleton
External skeletal structure
exoplanetary
Relating to distant worlds
external · exterior · outward · peripheral · surface · shell · atmospheric · boundary
extraterrestrial
Being from outer space
- offworlderPerson from another planet
- nonterrestrialNot of Earth
- spacefarerOne traversing the cosmos
martian · xenomorph · otherworldly · lifeform · astrobiology · interstellar · cosmic · grey · reptilian
- The ExorcistSeminal possession horror film
- exothermic reactionProcess releasing thermal energy
exorcism, exorcist, exoplanet, exosphere, exogamy, exothermic, exoteric, exotoxin, exogenous