misspelling

Definition from the Wikipedia:

While some words admit multiple spellings, some spellings are clearly incorrect and thus labeled as misspellings. A misspelled word can be a series of letters that represents no correctly spelled word of the same language at all (such as "liek" for "like") or a correct spelling of another word (such as writing "here" when one means "hear", or "now" when one means "know"). Misspellings of the latter type can easily make their way into printed material because they are not caught by simple computerized spell checkers.

Misspellings may be due to either typos (e.g. typing teh for the), or lack of knowledge of the correct spelling. Whether or not a word is misspelled may depend on context, such as American / British English distinctions. Misspelling can also be a matter of opinion when variant spellings are accepted by some and not by others. For example "miniscule" (for "minuscule") is a misspelling to many, and yet it is listed as a legitimate variant in a number of dictionaries.