Share this entry

Share this page


Syllabification: tri·clad
Pronunciation: /ˈtrīklad

Definition of triclad in English:


A free-living flatworm of an order characterized by having a gut with three branches, including the planarians.
  • Order Tricladida, class Turbellaria
Example sentences
  • We have searched for Hox and ParaHox genes in several flatworm groups spanning from freshwater triclads to marine polyclads and, more recently, in the acoels, the likely earliest extant bilaterian.
  • Despite several attempts, no ParaHox genes have so far been found in triclads.
  • The amplified fragment of EF1a varies in size, from 947 nt in the two polyclads to 962 nt in C. roscoffensis to 965 nt in the three triclads.


late 19th century: from modern Latin Tricladida, from tri- 'three' + Greek klados 'branch'.

Definition of triclad in:

Share this entry

Share this page


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day glen
Pronunciation: ɡlɛn
a narrow valley, especially in Scotland or Ireland