plural noun
Poly·​clad·​i·​da | \ ˌpälēˈkladədə, -lə̇ˈk-\

Definition of Polycladida

: an order of Turbellaria comprising broad flattened often brightly colored marine flatworms in which the alimentary tract has many primary branches radiating from a central cavity, the ovaries and testes are numerous, and no vitellarium is developed

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Polycladida

New Latin, from Polycladus, type genus (from Greek polyklados with many branches, from poly- + klados sprout, branch, twig) + New Latin -ida

Keep scrolling for more

Comments on Polycladida

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


recurring in steady succession

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Bee Cubed

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

Love words? Need even more definitions?

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