If you're repeatedly misspelling "prosteon", here are some possible correct suggestions. Firstly, you may have meant "protosteon", referring to a primitive or initial form of a bone. Alternatively, perhaps you intended to write "protean", meaning versatile or ever-changing. Lastly, "prostate" could be the correct term if you were referring to the gland in the male reproductive system. Double-check your intended word to clarify.