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ribbon worm

noun
1.
any of various slender, unsegmented marine worms of the phylum Nemertea, being able to contract and stretch to an extreme extent.
Origin
1850-1855
1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ribbon worm

ribbon worm

noun
1.
another name for nemertean (sense 1)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for ribbon worm

Nemertinea

any member of the invertebrate phylum Nemertea (sometimes called Nemertinea, or Rhynchocoela), which includes mainly free-living forms but also a few parasites of crustaceans, mollusks, and sea squirts. The majority of the approximately 900 known nemertean species are found in marine habitats. Some, however, live in freshwater or on land. The name proboscis worm derives from the muscular eversible proboscis, which is housed in a chamber above the gut. This tube-shaped organ, which in many aquatic forms has a needlelike stylet, is typically used to trap the prey; in land-dwelling species it may be used for rapid movement

Learn more about Nemertinea with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Word Value for ribbon

10
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