portal system

noun

Definition of portal system

: a system of veins that begins and ends in capillaries

Origin and Etymology of portal system

portal vein


Medical Dictionary

portal system

noun

medical Definition of portal system

: a system of veins that begins and ends in capillaries — see hepatic portal system, pituitary portal system

Learn More about portal system


Seen and Heard

What made you want to look up portal system? 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

a figure representing a hated person

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

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!