Trematoda

noun plural

Trem·​a·​to·​da ˌtrem-ə-ˈtōd-ə 

: a class of the phylum Platyhelminthes including the flukes and related parasitic flatworms that usually have no cellular epidermis or cilia but have a chitinous cuticle covering the body, suckers for adhesion, and a well-developed digestive tract

trematodan

-ˈtōd-ᵊn 

adjective

or trematodean

-ˈtōd-ē-ən