How do you spell Methodical

Available Definitions:
1)  a. - Arranged with regard to method; disposed in a suitable manner, or in a manner to illustrate a subject, or to facilitate practical observation; as, the methodical arrangement of arguments; a methodical treatise.
2)  a. - Proceeding with regard to method; systematic.
3)  a. - Of or pertaining to the ancient school of physicians called methodists.