Protistan
noun
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 and blue-green algae or may distribute the organisms between the kingdoms Plantae and Animalia according to dominant characteristics.
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 pro·tist (prō’tĭst)
n.
A unicellular, eukaroytic organism belonging to the former taxonomic kingdom Protista.
protist
(prō’tĭst)
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. Also called protoctist. See Table at taxonomy.
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noun 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 and blue-green algae or may distribute […]
- Protistology
[proh-ti-stol-uh-jee] /ˌproʊ tɪˈstɒl ə dʒi/ noun 1. the biology of the Protista.
- Protists
noun 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 and blue-green algae or may distribute […]
- Protium
noun, Chemistry. 1. the lightest and most common isotope of hydrogen. Symbol: H 1. noun 1. the most common isotope of hydrogen, having a mass number of 1 protium pro·ti·um (prō’tē-əm, prō’shē-) n. See hydrogen-1. protium (prō’tē-əm, -shē-əm) The most abundant isotope of hydrogen, having an atomic mass of 1. Its nucleus consists of a […]
- Proto
1. a combining form meaning “first,” “foremost,” “earliest form of,” used in the formation of compound words (protomartyr; protolithic; protoplasm), specialized in chemical terminology to denote the first of a series of compounds, or the one containing the minimum amount of an element. combining form 1. indicating the first in time, order, or rank: protomartyr […]