any of a class (Orthonectida) of rare wormlike parasites of various marine invertebrates; they are sometimes included in the mesozoans, a group regarded as intermediate between protozoans (single-celled animals) and metazoans (multicellular animals). See mesozoan.
ORTHONECTID
Meaning of ORTHONECTID in English
Britannica English vocabulary. Английский словарь Британика. 2012