Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


Any of various worms or wormlike animals of the phylum Annelida, characterized by an elongated, cylindrical, segmented body and including the earthworms and the leeches.

[From New Latin Annelida, phylum name, from French annelés, pl. past participle of anneler, to ring, from Old French anel, ring, from Latin ānellus, diminutive of ānus, ring.]

an·nel′i·dan (ə-nĕl′ĭ-dən) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Animals) any worms of the phylum Annelida, in which the body is divided into segments both externally and internally. The group includes the earthworms, lugworm, ragworm, and leeches
(Zoology) of, relating to, or belonging to the Annelida
[C19: from New Latin Annelida, from French annelés, literally: the ringed ones, from Old French annel ring, from Latin ānellus, from ānulus ring]
annelidan n, adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈæn l ɪd)

also an•nel•i•dan

(əˈnɛl ɪ dn)

1. any segmented worm of the phylum Annelida, which includes the earthworms and leeches.
2. of or pertaining to the annelids.
[1825–35; < New Latin Annelida < Latin ānellus, diminutive of ānus ring]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


Any of various worms or worm-like animals having soft, elongated bodies that are divided into ring-like segments. The earthworm and leech are annelids.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.annelid - worms with cylindrical bodies segmented both internally and externallyannelid - worms with cylindrical bodies segmented both internally and externally
worm - any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
Annelida, phylum Annelida - segmented worms: earthworms; lugworms; leeches
archiannelid - small primitive marine worm lacking external segmentation and resembling polychaete larvae
oligochaete, oligochaete worm - hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body
polychaete, polychaete worm, polychete, polychete worm - chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles
bloodsucker, hirudinean, leech - carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
Adj.1.annelid - relating to or belonging to or characteristic of any worms of the phylum Annelidaannelid - relating to or belonging to or characteristic of any worms of the phylum Annelida
zoological science, zoology - the branch of biology that studies animals
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


[ˈænəlɪd] nanellide m
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in classic literature ?
But it is conceivable that the now utterly lost branchiae might have been gradually worked in by natural selection for some quite distinct purpose: in the same manner as, on the view entertained by some naturalists that the branchiae and dorsal scales of Annelids are homologous with the wings and wing-covers of insects, it is probable that organs which at a very ancient period served for respiration have been actually converted into organs of flight.
Veliger larvae of molluscs and some annelid larvae capture food with opposed bands of cilia (Hatschek, 1878, 1880a, b, 1885; Nielsen, 1987; Hansen, 1993; Pernet et al., 2015; Pernet, 2018).
Histidine: A novel antimicrobial peptide containing bromotryptophan constitutively expressed in the NK cells-like of the marine annelid, Nereis diversicolor.
The leeches that I have driven several hundred miles to encounter are freshwater, bloodsucking, multi-segmented annelid worms with 10 stomachs, 32 brains, nine pairs of testicles, and several hundred teeth that leave a distinctive bite mark.
In this study, we evaluated the effects of annelid and nematode feeding on Amatitlania nigrofasciata and Herotilapia multispinosa growth performances and some histologic parameters in aquariums.
Articulating "archiannelids": Phylogenomics and annelid relationships, with emphasis on meiofaunal taxa.
The relationship of temperature and dissolved oxygen to the seasonal settlement of the poly chaetous annelid Hydroides norvigica (Gunnerus).
Very few Annelid species live in Sulfur-rich environments.
The 40cm (15.7in) annelid, weighing 26g, is the largest earthworm ever found in the UK.
The 40cm (15.7 inch) annelid, weighing 26g, is the size of a small snake and the largest earthworm ever found in the UK.
1999) and snowy egret (370 g; Palmer 1962) prey upon earthworms and annelid worms, aquatic and terrestrial insects and crabs, marine fish, and even frogs, snakes, and lizards (Kushlan 1978a, 1978b, Parsons & Master 2000).