Definitions for Protozoa
pro·to·zoa

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Protozoa, phylum Protozoanoun

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

WiktionaryRate this definition:0.0 / 0 votes

1. protozoanoun

   Plural form of protozoan.

2. protozoanoun

   Plural form of protozoon.

WikipediaRate this definition:0.0 / 0 votes

1. Protozoa

   Protozoa (singular: protozoan or protozoon; alternative plural: protozoans) are a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris. Historically, protozoans were regarded as "one-celled animals", because they often possess animal-like behaviours, such as motility and predation, and lack a cell wall, as found in plants and many algae.When first introduced by Georg Goldfuss (originally spelled Goldfuß) in 1818, the taxon Protozoa was erected as a class within the Animalia, with the word 'protozoa' meaning "first animals". In later classification schemes it was elevated to a variety of higher ranks, including phylum, subkingdom and kingdom, and sometimes included within Protoctista or Protista. The approach of classifying Protozoa within the context of Animalia was widespread in the 19th and early 20th century, but not universal. By the 1970s, it became usual to require that all taxa be monophyletic (derived from a common ancestor that would also be regarded as protozoan), and holophyletic (containing all of the known descendants of that common ancestor). The taxon 'Protozoa' fails to meet these standards, and the practices of grouping protozoa with animals, and treating them as closely related, are no longer justifiable. The term continues to be used in a loose way to describe single-celled protists (that is, eukaryotes that are not animals, plants, or fungi) that feed by heterotrophy. Some examples of protozoa are Amoeba, Paramecium, Euglena and Trypanosoma. Despite awareness that the traditional taxonomic concept of "Protozoa" did not meet contemporary taxonomic standards, some authors have continued to use the name, while applying it to differing scopes of organisms. In a series of classifications by Thomas Cavalier-Smith and collaborators since 1981, the taxon Protozoa was applied to a restricted circumscription of organisms, and ranked as a kingdom. A scheme presented by Ruggiero et al. in 2015, places eight not closely related phyla within Kingdom Protozoa: Euglenozoa, Amoebozoa, Metamonada, Choanozoa sensu Cavalier-Smith, Loukozoa, Percolozoa, Microsporidia and Sulcozoa. Notably, this approach excludes several major groups of organisms traditionally placed among the protozoa, including the ciliates, dinoflagellates, foraminifera, and the parasitic apicomplexans, which were located in other groups such as Alveolata and Stramenopiles, under the polyphyletic Chromista. The Protozoa in this scheme do not form a monophyletic and holophyletic group (clade), but a paraphyletic group or evolutionary grade, because it excludes some descendants of Protozoa, as used in this sense.

ChatGPTRate this definition:0.0 / 0 votes

1. protozoa

   Protozoa are a diverse group of single-celled eukaryotic organisms, many of which are motile. Originally, protozoa had been defined as single-celled organisms with animal-like behaviors, such as motility and predation. They are heterotrophs, meaning they obtain food by consuming other organisms. Protozoa are found in various habitats such as soil, fresh and salt water. They play an important role in the food chain as both predators and prey. Some protozoa are parasitic and can cause diseases in humans and other animals.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Protozoa

   the lowest of the grand divisions of the animal kingdom

2. Protozoa

   of Protozoon

3. Etymology: [NL., fr. Gr. first + zw^,on an animal.]

WikidataRate this definition:0.0 / 0 votes

1. Protozoa

   Protozoa are a diverse group of unicellular eukaryotic organisms, many of which are motile. Originally, protozoa had been defined as unicellular protists with animal-like behavior, e.g., movement. Protozoa were regarded as the partner group of protists to protophyta, which have plant-like behaviour, e.g., photosynthesis.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Protozoa

   prō-tō-zō′ä, n.pl. the first or lowest class of animals:—sing. Protozō′on.—adjs. Protozō′an; Protozō′ic, pertaining to the protozoa: containing remains of the earliest life of the globe. [Gr. prōtos, first, zōon, an animal.]

Matched Categories

1. • Phylum

How to pronounce Protozoa?

1. Alex

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Numerology

1. Chaldean Numerology

   The numerical value of Protozoa in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of Protozoa in Pythagorean Numerology is: 9

Examples of Protozoa in a Sentence

1. Jaroslaw Kaczynski:

   There are already signs of emergence of diseases that are highly dangerous and have not been seen in Europe for a long time: cholera on the Greek islands, dysentery in Vienna. There is also talk about other, even more severe diseases, also there are some differences related to geography, various parasites, protozoa that are common and are not dangerous in the bodies of these people, (but) may be dangerous here. Which doesn't mean there is a need to discriminate anyone, but you need to check.

2. Karl Reinhard:

   Parasites travel long distances within their hosts, protozoa [single-celled organisms], as well as parasites, can be found in ancient contexts.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Protozoa
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Protozoa
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Protozoa
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/Protozoa
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Protozoa
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=Protozoa