(1) DEFINITIONS. In this section: (a) "Child" means a natural, adopted, or foster child, a stepchild, or a legal ward to whom any of the following applies: 1. The individual is less than 18 years of age. 2. The individual is 18 years of age or older and cannot care for himself or herself because of a serious health condition. (am) "Christian Science practitioner" means a Christian Science practitioner residing in this state who is listed as a practitioner in the Christian Science journal. (ar) "Domestic