any of a phylum (Nemertea) of usually very elongate, unsegmented marine worms with no body cavity and with a protrusile proboscis, living mostly in coastal mud or sand; ribbon worm
Origin of nemertean; from Modern Latin Nemertea ; from Classical Greek N?mert?s, name of a sea nymph ; from n?mert?s, unerring
of or belonging to these worms
also nem′er·tine or nem·er·tin′ean
Any of various unsegmented chiefly carnivorous worms of the phylum Nemertea (or Nemertini) that have a long, often brightly colored body with an extensible proboscis and typically live in the sea or in the mud of the intertidal zone. Also called ribbon worm.
Origin of nemerteanFrom New Latin N&emacron;mert&emacron;s, type genus, from Greek, name of a Nereid.