rhynchocoelan
/ˌrɪŋkə(ʊ)ˈsiːlən/(also rhyncocoelan)
noun
A worm of the phylum Rhynchocoela (now usually called Nemertea), characterized by an eversible proboscis; a nemertean worm.
adjective
Of or relating to the phylum Rhynchocoela; = rhynchocoel.
Origin
1960s; earliest use found in The Biological Bulletin. From scientific Latin Rhynchocoela, phylum name + -an.