3. A child under the age of eighteen upon a parent and a child over such age if physically or mentally incapacitated from earning a livelihood or a child under the age of twenty-three if enrolled as a full-time student in any accredited educational institution; and
B. As used in this section, the term “child” shall include a stepchild, a legally adopted child, a posthumous child, and an acknowledged illegitimate child, but shall not include a married child; and the term “parent” shall include stepparents and parents by adoption.
Code 1950, § 65-63; 1968, c. 660, § 65.1-66; 1973, cc. 401, 542; 1991, c. 355.