1) Biology beginner 2) Combining form meaning outer 3) External prefix 4) Intro to skeleton 5) It means outside 6) Kind of skeleton 7) Lead-in for skeleton 8) Opposite of eso 9) Outer- 10) Outside combiner 11) Outside opening 12) Physics prefix for sphere 13) Prefix for skeleton 14) Prefix for sphere 
• A prefix signifying out of, outside; as in exocarp, exogen, exoskeleton.
Exotic Shorthair.