vitamin B12

play
noun \ -ˈbē-ˈtwelv \

Definition of vitamin B12

1 :a complex cobalt-containing compound C63H88CoN14O14P that occurs especially in liver, is essential to normal blood formation, neural function, and growth, and is used especially in treating pernicious and related anemias and in animal feed as a growth factor called also cyanocobalamin
2 :any of several compounds similar to vitamin B12 in action but having different chemistry

First Known Use of vitamin b{inf}12{/inf}

1948


Medical Dictionary

vitamin B12

noun \ -ˈbē-ˈtwelv \

medical Definition of vitamin B12

1 :a complex cobalt-containing compound C63H88CoN14O14P found in animal products (as meat and eggs) that is essential to normal blood formation, neural function, and growth and is used especially in treating pernicious and related anemias and in animal feed as a growth factor called also cyanocobalamin
2 :any of several compounds similar to vitamin B12 in action but having different chemistry

Learn More about vitamin b12


Seen and Heard

What made you want to look up vitamin B12? 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

alert quickness of mind or body

Get Word of the Day daily email!

Test Your Vocabulary

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

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!