misspelling (noun, plural: misspellings)
Simply means: a wrongly spelled word (or spelt! - contrary to what many think, this isn't a misspelling, but a seldom used form of spelled).

Typos, on the other hand, refer specifically to typographical errors (of which typo is an abbreviation), which appeared with the first printing press (see Gutenberg). They generally occur in printed material, or during the use of an implement or machinery whose output is print-like in appearance (including the printing press itself, typewriters, computers and their keyboards etc.).
An example of a misspelled word would be: phoenatically, us...