heme

play
noun \ˈhēm\

Definition of heme

  1. :  the deep red iron-containing prosthetic group C34H32N4O4Fe of hemoglobin and myoglobin

Recent Examples of heme from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heme'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of heme

International Scientific Vocabulary, from hematin


Medical Dictionary

heme

noun
variants: or chiefly British

haem

\ˈhēm\play

Medical Definition of heme

  1. :  the deep red iron-containing prosthetic group C34H32N4O4Fe of hemoglobin and myoglobin that is a ferrous derivative of protoporphyrin and readily oxidizes to hematin or hemin—called also protoheme


Learn More about heme


Seen and Heard

What made you want to look up heme? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to become worse as time passes

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!