Definitions:

1. A doctor who has special training in medical care of children. NOUN
   • The pediatrician conducted a thorough examination of the child's growth and development.
2. A medical practitioner specializing in children and their diseases. NOUN
   • The first duty of the pediatrician is always to the baby's best interests.
3. A specialist in the care of babies and young children. NOUN
   • I took my child to see a pediatrician.

Synonyms:

• baby doctor
• child specialist
• children's doctor
• pediatric practitioner