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.


(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


(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]


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.
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


[ˈænəlɪd] nanellide m
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.
org/content/11/7/20150431) Biology Letters , the sperm came from the walls of a cocoon belonging to an annelid, a member of the family of segmented worms that include the earthworm and leeches.
The traces Taenidium and Helminthoidichnites are usually thought to have been made by annelid worms.
7in) annelid, weighing 26g, is the largest earthworm ever found in the UK.
7 inch) annelid, weighing 26g, is the size of a small snake and the largest earthworm ever found in the UK.
Complementary striped expression patterns of NK homeobox genes during segment formation in the annelid Platynereis.
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).
The halkieriids bore conical mollusk-like shells as well as calcareous structures similar to the chitinous bristles typical of polychaete annelid worms.
Increased insect and annelid (segmented worm) numbers ensure aeration and long-term nutrient cycling.
By sequencing the DNA and RNA from the accretion ice samples, the team identified thousands of bacteria, including some that are commonly found in the digestive systems of fish, crustaceans and annelid worms, in addition to fungi and two species of archaea, or single-celled organisms that tend to live in extreme environments.
2007): <<Isolation, characterization and cDNA cloning of a novel bifunctional inhibitor of metallo carboxypeptidase and serine proteases isolated from the annelid Sabellastarte magnifica>>, Revista Cubana de Quimica, vol.