1. the first feces of a newborn mammal, typically dark green and sticky
Usage: medical

Examples

• The nurse checked for meconium in the newborn’s diaper.
• Meconium is usually passed within the first 24 hours after birth.
• The presence of meconium in amniotic fluid can indicate fetal distress.
• Unlike regular stool, meconium is odorless and tar-like in consistency.
• Doctors monitor for meconium passage as a sign of normal digestive function.
• The baby’s first meconium stool was dark green as expected.