meconium

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/mɪˈkəʊnɪəm/US:USA pronunciation: respellingUSA pronunciation: respelling(mi kōnē əm)


WordReference Random House Unabridged Dictionary of American English © 2026
me•co•ni•um  (mi kōnē əm),USA pronunciation n. 
  1. Physiologythe first fecal excretion of a newborn child, composed chiefly of bile, mucus, and epithelial cells.
  2. Insectsfecal mass released at pupation by the larvae of some insects.
  3. Drugs, Botanythe milky sap of the unripe seed pods of the opium poppy;
    crude opium.
  • Greek mēkó̄nion, diminutive of mé̄kōn poppy
  • Latin
  • 1595–1605

Collins Concise English Dictionary © HarperCollins Publishers::
meconium /mɪˈkəʊnɪəm/ n
  1. the dark green mucoid material that forms the first faeces of a newborn infant
Etymology: 17th Century: from New Latin, from Latin: poppy juice (used also of infant's excrement because of similarity in colour), from Greek mēkōneion, from mēkōn poppy

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