|1.||the dark green mucoid material that forms the first faeces of a newborn infant|
|2.||opium or the juice from the opium poppy|
|[C17: from New Latin, from Latin: poppy juice (used also of infant's excrement because of similarity in colour), from Greek mēkōneion, from mēkōn poppy]|
meconium me·co·ni·um (mĭ-kō'nē-əm)
A dark green fecal material that accumulates in the fetal intestines and is discharged at or near the time of birth.