Parent" means a biological parent, a husband who has consented to the artificial insemination of his wife under s. 891.40, or a parent by adoption. If the juvenile is a nonmarital child who is not adopted or whose parents do not subsequently intermarry under s. 767.803, "parent" includes a person acknowledged under s. 767.805 or a substantially similar law of another state or adjudicated to be the biological father. "Parent" does not include any person whose parental rights have been terminated. For purposes of the application of s. 938.028 and the federal Indian Child Welfare Act, 25 USC 1901 to 1963, "parent" means a biological parent, an Indian husband who has consented to the artificial insemination of his wife under s. 891.40, or an Indian person who has lawfully adopted an Indian juvenile, including an adoption under tribal law or custom, and includes, in the case of a nonmarital child who is not adopted or whose parents do not subsequently intermarry under s. 767.803, a person acknowledged under s. 767.805, a substantially similar law of another state, or tribal law or custom to be the biological father or a person adjudicated to be the biological father, but does not include any person whose parental rights have been terminated.