dependent child
(11) In this subsection, the term “dependent child”, with respect to a member or former member of the armed forces referred to in paragraph (2)(A), means an unmarried legitimate child, including an adopted child or a stepchild of the member or former member, who— (A) is under 18 years of age; (B) is incapable of self-support because of a mental or physical incapacity that existed before becoming 18 years of age and is dependent on the member or former member for over one-half of the child’s support; or (C) if enrolled in a full-time course of study in an institution of higher education recognized by the Secretary of Defense for the purposes of this subparagraph, is under 23 years of age and is dependent on the member or former member for over one-half of the child’s support.