protist

[ proh-tist ]

noun

, Microbiology

1. any of various one-celled organisms, classified in the kingdom Protista, that are either free-living or aggregated into simple colonies and that have diverse reproductive and nutritional modes, including the protozoans, eukaryotic algae, and slime molds: some classification schemes also include the fungi and the more primitive bacteria or may distribute the organisms between the kingdoms Plantae and Animalia according to dominant characteristics.

protist

/ ˈprəʊtɪst /

noun

1. (in some classification systems) any organism belonging to the kingdom Protista, originally including bacteria, protozoans, algae, and fungi, regarded as distinct from plants and animals. It was later restricted to protozoans, unicellular algae, and simple fungi See also protoctist

protist

/ prō′tĭst /

1. Any of a large variety of usually one-celled organisms belonging to the kingdom Protista (or Protoctista). Protists are eukaryotes and live in water or in watery tissues of organisms. Some protists resemble plants in that they produce their own food by photosynthesis, while others resemble animals in consuming organic matter for food. Protist cells are often structurally much more elaborate than the cells of multicellular plants and animals. Protists include the protozoans, most algae, diatoms, oomycetes, and the slime molds.
2. Also called protoctist
3. See Table at taxonomy

Other Words From

• pro·tis·tan [proh-, tis, -t, uh, n], adjective noun
• pro·tis·tic [proh-, tis, -tik], adjective

Word History and Origins

Origin of protist¹

First recorded in 1870–75; from German Protist (masculine singular), from New Latin Protista (neuter plural) name of the kingdom, from Greek prṓtistos (masculine singular) “the very first,” superlative of prôtos “first”; proto-

Word History and Origins

Origin of protist¹

C19: from New Latin Protista most primitive organisms, from Greek prōtistos the very first, from prōtos first

Example Sentences

It differs from known protists by the presence of two lateral arms that swing back and forth.

From Science Daily

Eukarya forms one of the major domains of life, encompassing the plant, animal and fungi clades, as well as all other groups whose cells have a membrane-bound nucleus, like protists and seaweeds.

From Science Daily

Chlamydomonas cells, like those of many other algae and single-celled protists, can grow very large before they divide.

From Science Daily

Dr McGowan said: "It's sheer luck we chose this protist to test our sequencing pipeline, and it just shows what's out there, highlighting just how little we know about the genetics of protists."

From Science Daily

Besides bacteria, the gut microbiota also consists of other types of microorganisms, including protists, yeasts, and viruses.

From Science Daily