Protozoa

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pro·to·zo·an

(prō′tə-zō′ən) also pro·to·zo·on (-ŏn′)

n. pl. pro·to·zo·ans or pro·to·zo·a (-zō′ə) also pro·to·zo·ons

Any of numerous chiefly single-celled eukaryotic organisms, most of which move about freely and ingest food, including the amoebas, ciliates, flagellates, and apicomplexans. Protozoans along with certain algae, oomycetes, and some other groups make up the protists.

[From New Latin Prōtozōa, former subkingdom name : proto- + -zōa, pl. of -zōon, -zoon.]

pro′to·zo′an, pro′to·zo′al, pro′to·zo′ic adj.

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Noun

Protozoa - in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers

phylum Protozoa

kingdom Protoctista, Protoctista - in most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals

protozoan, protozoon - any of diverse minute acellular or unicellular organisms usually nonphotosynthetic

class Sarcodina, Sarcodina - characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda

Ciliata, Ciliophora, class Ciliata, class Ciliophora - class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle

class Flagellata, class Mastigophora, Flagellata, Mastigophora - protozoa having flagella

class Sporozoa, Sporozoa - strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites

phylum - (biology) the major taxonomic group of animals and plants; contains classes

References in classic literature ?

In attempting to understand the elements out of which mental phenomena are compounded, it is of the greatest importance to remember that from the protozoa to man there is nowhere a very wide gap either in structure or in behaviour.

View in context

Ticks transmit a variety of different pathogens including bacteria, protozoa, and viruses that can produce serious and even fatal disease in humans and animals.

Ticks

Protozoa was absolutely dominated in zooplankton abundance and its mean value ranged from 2710.

Responses of Zooplankton Community to Environmental Factors and Phytoplankton Biomass in Lake Nansihu, China

It is true that it is difficult for microscopists who are not familiar with the technique to become skilled at differentiating between multiflagellated protozoa and bronchial ciliated cells.

Lophomonas blattarum: Is it Only its Morphology that Prevents its Recognition?

Study was done to determine the role of flushing in removal of free-living protozoa, Legionella spp.

IS FLUSHING OF DENTAL WATER LINES EFFECTIVE IN REMOVING MICROBIAL CONTAMINANTS?

Reviews of the effects of enteric protozoa on digestion and productivity by ruminants have concluded removal of rumen ciliate protozoa reduces enteric methane (C[H.

Effects of rumen protozoa of Brahman heifers and nitrate on fermentation and in vitro methane production

Archaea, yeasts, protozoa, and viruses are the nonbacterial microorganisms that are found in plaque.

Role of Entamoeba gingivalis in periodontitis: myth or reality!

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The morphological characteristics of these protozoa are described and their relationship to similar entodiniid species are discussed.

New Rumen Ciliate, Entodinium kastamonicum, New Species (Ophryoscolecidae: Entodiniomorphida) from Turkish Domestic Cattle, Bos taurus Taurus

2008) reported that tannins reduced the methane emission by inhibiting protozoa as well as presumably lowering the methanogenic activity of protozoal-associated methanogens.

EFFECT OF CENTELLA ASIATICA POWDER (CAP) AND MANGOSTEEN PEEL POWDER (MPP) ON RUMEN FERMENTATION AND MICROBIAL POPULATION IN SWAMP BUFFALOES

Infections with protozoa are common in poultry that may range from mild to severe resulting in the disease.

Endoparasitic threats to layer industry in Punjab

Immunohistochemistry was negative for Sarcocystis falcatula and Neospora caninum and confirmed the protozoa as T gondii.