Share this entry
Orthonectida Syllabification: Or·tho·nec·ti·da
Pronunciation: /ˌôrTHəˈnektidə/

Definition of Orthonectida in English:

A minor phylum of mesozoan worms that are internal parasites of a range of marine invertebrates.
Example sentences
  • They are now believed to be made up of two, possibly unrelated, groups: the Dicyemida and Orthonectida.
  • As it turns out, the Orthonectida are almost certainly metazoans, particularly under our stem group definition; but it's anyone's guess whether they, or any other members of the mysterious Mesozoa, are also bilaterians.


noun& adjective
Example sentences
  • In some orthonectids, circular and longitudinal muscles occur beneath the epidermis.


Modern Latin (plural), from Greek orthos 'straight' + nektos 'swimming' (see nekton).

Definition of Orthonectida in:
Share this entry

What do you find interesting about this word or phrase?

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

Subscribe to remove adverts and access premium resources