Pediatrician (noun)

1. A medical doctor who specializes in the medical care of infants, children, and adolescents.
2. A doctor who is trained to diagnose and treat the diseases and health problems of children.
3. A doctor who provides care for children from birth to adolescence.

Origin:

From the greek word paidiōtikos, which means "of children", from paidiōtēs "childish", from paidion "child" + -ikos "-ic" + -ian.

Examples:

1. The pediatrician examined the baby and found that he was healthy.
2. She took her child to see the pediatrician for a check-up.
3. The pediatrician prescribed medicine for the child's ear infection.
4. A pediatrician is a specialist in child health care.
5. The pediatrician was able to diagnose the child's problem quickly.