three-year-old
- s three years of age
- He said, "What do you tell a three-year-old who doesn't understand?" And he said, "Once having told a three-year-old something that they could cope with at the time, how do you .
- The California Republican was a supporter of President Bush's three-year-old policy severely restricting government-funded stem-cell research.
- When the welfare officers came to take three-year-old Archie Roach from his tin-lined house in Framlingham in southeastern Australia, they told his mother they were escorting him .