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hemoglobin

noun

Simple meaning

The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body.

Pronunciation

Say it like this:

heemuhglohbuhn

Say the bold part a little louder.

US device voice
IPA pronunciation (US)

himəɡˈloʊbən

This word is pronounced essentially the same in American and British English, so one transcription covers both.

IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.

Word Review

Definition

Everyday modern meanings first, grouped by part of speech.

noun

  1. American spelling

    The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (globulin), and haem (a porphyrin ring with an atom of iron at its centre).

Word at a Glance

Difficulty
C1 · Advanced (estimated)
Frequency
Uncommon
Formality
Technical

Word Aura™

How this word commonly comes across.

This meaning: (American spelling) The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (globulin), and haem (a porphyrin ring with an atom of iron at its centre).

Used this way, hemoglobin is a word tied to one variety of English that usually carries little praise or criticism of its own. This is a scientific use: it names something precisely within a field of study, so it appears in research and teaching more than in conversation.

Emotional tone
Neutral
Formality
Specialist/technical
Intensity
Not strongly marked
How common
Regional
Connotation
Clinical and technical
Usage feel
Technical and specialized

Where it naturally appears

  • Science
  • Academic writing
  • Technical/specialist writing

Usage note

Mainly used in American English, so it may read as unusual elsewhere.

Word Aura describes common impressions, not a measurement. Tone changes with sentence, speaker, relationship and situation.

More ways to use hemoglobin

  • “Fish have simpler hemoglobin than mammals.”noun

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Common Patterns and Combinations

How this word naturally appears with others.

fetal hemoglobinhemoglobin concentrationhemoglobin levelnormal hemoglobinhemoglobin moleculehemoglobin contenthuman hemoglobinreduced hemoglobin

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Related Words

Connected to the same idea, not synonyms.

More about this wordSynonyms, forms, origin

Synonyms

Sense: iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body

haemoglobin

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Dictionary data from Wiktionary via the Free Dictionary API. Simple meanings, combinations and word intelligence are built from verified reference data, no AI is used to load this page.