SINCE 1828

An Encyclopædia Britannica Company

Medical Dictionary

metmyoglobin

play

noun met·myo·glo·bin \ ˈmet-ˈmī-ə-ˌglō-bən \

medical Definition of metmyoglobin

:a reddish brown crystalline pigment that is formed by oxidation of myoglobin

Seen and Heard

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

show

WORD OF THE DAY

broadside

play

a strongly worded attack

Words at Play

10 Uncommon Words for 'Drunkard'

Tosspots, stewbums, and all the rest

alt-59c94ad823f29

'Meat Sweats': The Cookout's Worst Nightmare

They're real, but is meat the cause?

alt-59c919f342079

'Diffuse' vs. 'Defuse'

Let us defuse the situation.

alt-59c52d6ee2f72

Breathing Life Into 'Inspire'

The word's origins are quite literal

Ask the Editors

video-title-words-of-the-year-1066

Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless

Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals

Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

young-plant-shoots

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

You're going to have to memorize the dictionary again.

Take the quiz

stylized-drawing-of-woman-pole-vaulting-across-gap-to-get-trophy

Challenging Vocabulary Quiz Returns!

No tricks, just difficult words.

Take the quiz

True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz

Word Winder's CrossWinder

Word Winder's CrossWinder

A game of winding words.

Play the game