Definition of "nemertean" [ne•mer•te•an]

• Any of several velvety, usually brightly colored worms of the phylum Nemertina (or Nemertea) that have a flat, unsegmented body with an extensible proboscis and live in the sea or in the mud of the intertidal zone. Also called ribbon worm. (noun)
• Of or belonging to the phylum Nemertina (or Nemertea). (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Other predators include crayfish, turbellarians, and nemertean worms."
• "I don't know much about nemertean biology, so I looked them up in my old edition of Barnes' Invertebrate Biology."
• "There is also one potentially endemic spider, 11 endemic terrestrial mollusks, and one (now-extinct) endemic nemertean, Pantinonemertes agricola."