from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A dark green fecal material that accumulates in the fetal intestines and is discharged at or near the time of birth.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A dark green mass, the contents of the fetal intestines during the later stages of mammalian gestation, that forms the first faeces of the newborn
  • n. opium

from the GNU version of the Collaborative International Dictionary of English

  • n. Opium.
  • n. The contents of the fetal intestine; hence, first excrement.

from The Century Dictionary and Cyclopedia

  • n. Poppy-juice.
  • n. The feces of a new-born infant.
  • n. In entomology, the feces of an adult insect just transformed from the pupa.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. thick dark green mucoid material that is the first feces of a newborn child


from The American Heritage® Dictionary of the English Language, 4th Edition

Latin mēcōnium, poppy juice, from Greek mēkōnion, from mēkōn, poppy.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin mēcōnium ("opium; excrement of a newborn child"), from Ancient Greek μηκώνιον ("poppy-juice, opium"), from μήκων ("poppy").


  • Sometimes the meconium can become impacted within the rectum or small colon of foals -- thus, the term meconium impaction. News

  • However, newborn infants produce this stuff called meconium which is like fecal tar.

    The NYT is trying to take away our toilet paper!

  • The belief is that suctioning prevents the baby from inhaling meconium, thereby preventing breathing problems or a rare type of pneumonia called meconium aspiration syndrome.

    Pregnancy, Childbirth, and the Newborn

  • Fetal defecation isn't normal, but fetuses do accumulate a mass of greenish feces, called meconium, in their intestines.

    I did not know that: fetuses urinate and (can) poop

  • Fetuses take amniotic fluid into their lungs, and in a minority of MSAF cases, passed meconium enters the airway before birth and afterward leads to respiratory symptoms collectively called meconium aspiration syndrome MAS.

    I did not know that: fetuses urinate and (can) poop

  • This blackish mixture, called meconium, will become her first bowel movement.

    Baby at 36 weeks

  • This is called meconium and is a sign that the baby has passed his or her first stool (bowel movement).

    Chapter 13

  • Also, babies do NOT have a bowel movement (meconium) in utero unless baby is in distress, known as meconium aspiration syndrome. Master Site Feed

  • a little later, but in all cases during the first day; and this excrement is unduly copious in comparison with the size of the child; it is what the midwives call the meconium or

    The History of Animals

  • Researchers will also take biological samples from mothers -- and from newborns from birth through two years of age -- including blood, saliva, breast milk, urine, umbilical cord and placental material and "meconium," a baby's first stool, in which toxins may have accumulated over time.

    David Kirby: NIH Autism Study to Leave No Stone Unturned


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  • Meconium is normally stored in the infant's intestines until after birth, but sometimes (often in response to fetal distress) it is expelled into the amniotic fluid prior to birth, or during labor. If the baby then inhales the contaminated fluid, respiratory problems may occur.

    See Meconium Aspiration Syndrome".

    When a woman's water breaks, it should be fairly clear. If it's greenish or dark... that's an indication that meconium is present (meconium staining). This requires a doctor's attention.

    May 14, 2011

  • Why did I always think this word was mecomium (with an M in the middle)?

    February 7, 2008

  • *barf*

    October 3, 2007

  • "The kidneys are functioning, but for the first few days after delivery, the baby will not have many wet diapers. The frequency of wet diapers increases by the end of the week. The digestive system is working and the first bowel movement will be the sticky, dark, tarlike stool called meconium."


    October 3, 2007