meconium

/mɪˈkəʊnɪ.əm/

//mɪˈkəʊnɪ.əm// noun

"meconium" is a 8-letter English headword indexed on PlainSpell.

The verdict

“meconium” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A dark green mass, the contents of the fetal intestines during the later stages of mammalian gestation, that forms the first feces of the newborn.

Corpus desk

Index EN-meconium · meconium · English

meconium · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "M" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for meconium
PropertyValue
Headwordmeconium
LanguageEnglish
Part of speechNoun
IPA/mɪˈkəʊnɪ.əm/
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “meconium” in English

meconiumfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

meconium is uncommon English outside the top frequency list, classed as anoun, transcribed /mɪˈkəʊnɪ.əm/. Rarity is why readers land here mid-draft. 2 senses are on record.

No misspelling variants are generated for meconium in our index, since its letter pattern doesn't lend itself to common typo substitutions. No confusable counterpart is on file for this word, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From Latin mēcōnium (“opium; excrement of a newborn child”), from Ancient Greek μηκώνιον (mēkṓnion, “poppy-juice, opium”), from μήκων (mḗkōn, “poppy”). The correct English form is meconium, spelled M-E-C-O-N-I-U-M.

Definition

  1. 1
    A dark green mass, the contents of the fetal intestines during the later stages of mammalian gestation, that forms the first feces of the newborn.
  2. 2
    Opium.

Recorded use

Wiktionary example

These source excerpts show how meconium appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. The meconium is dark brownish-green in color. The first meconium passed is semi-solid, having been partially dried out in the large intestine.

Etymology

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

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "meconium"?
"meconium" is spelled M-E-C-O-N-I-U-M. The IPA pronunciation is /mɪˈkəʊnɪ.əm/.
What does "meconium" mean?
As a noun, "meconium" means: A dark green mass, the contents of the fetal intestines during the later stages of mammalian gestation, that forms the first feces of the newborn.
How do you pronounce "meconium"?
The IPA (International Phonetic Alphabet) transcription for "meconium" is /mɪˈkəʊnɪ.əm/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "meconium"?
From Latin mēcōnium (“opium; excrement of a newborn child”), from Ancient Greek μηκώνιον (mēkṓnion, “poppy-juice, opium”), from μήκων (mḗkōn, “poppy”). See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list