Planariidae

noun plural
Plan·​a·​ri·​idae | \ˌplan-ə-ˈrī-ə-ˌdē \

Medical Definition of Planariidae 

: a large family of small soft-bodied usually leaf-shaped flatworms of the order Tricladida that are almost all free-living in fresh water and often have well-developed eyespots — see planaria

Learn More about Planariidae

Share Planariidae

Dictionary Entries near Planariidae

plana

planaria

planarian

Planariidae

Plan B

planchet

Planck's constant

Comments on Planariidae

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

WORD OF THE DAY

obstinately defiant of authority

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
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!