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Any of various single-celled aquatic organisms of the phylum (or division) Euglenophyta, characterized by a grooved cell surface, a reddish eyespot, and undulating movement by means of flagella.

[New Latin Euglēna, genus typical of the taxon; see euglena + -oid.]


(yuˈgli nɔɪd)

also eu•gle•nid

1. of, pertaining to, or resembling euglenas.
2. pertaining to or designating the wormlike movement, produced by wavelike contractions, characteristic of euglenas.
3. a euglena or euglenoid organism.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.euglenoid - marine and freshwater green or colorless flagellate organism
alga, algae - primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
division Euglenophyta, Euglenophyta - free-swimming flagellate algae
References in periodicals archive ?
Clockwise from top left, 'Healing 6 months later', by Kathleen Sheffer; 'Chloroplasts', dying euglenoid alga showing the release of its chloroplasts (green) taken from a polluted lake in Vietnam by Steve Gschmeissner; 'Surface Tension' , a safety pin sitting on the surface of water by Richard Germain; 'Tapeworm', a micrograph of the head of a pork tapeworm by Teresa Zgoda; and cellulose fibres in a Kleenex tissue by Alessandra Menegon
The euglenoid Euglena cantabrica showed relevant amounts of gallic and protocatechuic acids at mg levels per g DW and a significant antioxidant activity probably due to the presence of the high contents of phenolics.
Euglenoid Blooms in the Flood Plain Wetlands in Barak Valley, Assam, North Eastern India.
Chrysophytes and euglenoid flagellates recorded higher density at low tide (495.31 [+ or -] 79.33 no/mL and 105.74 [+ or -] 19.55 no/mL) than at high tide (124.25 [+ or -] 33.99 no/mL and 68.63 [+ or -] 17.78 no/mL) (Figure 3).
Epibiotic euglenoid flagellates increase the susceptibility of some zooplankton to fish predation.
For phycologists and protozoologists, as well as for ecologists or managers involved with wetland systems, this elegantly prepared, beautifully illustrated book (at a surprisingly low price) represents a portion of the work from The Euglenoid Project at Michigan State University, which is supported financially by a grant from The National Science Foundation's Partnerships for Enhancing Expertise in Taxonomy (PEET).