- Protist is the highest scientific classification of a group of one-celled organisms.
An example of a protist is the group of microscopic organisms that cause maleria.
Biol. in some systems of classification, any of a kingdom (Protista) of one-celled organisms, as algae, yeasts, or protozoans, having characteristics found in both plants and animals
Origin of protist; from Classical Greek prōtistos, first ; from prōtos, first: see proto-
Any of numerous eukaryotic organisms that are not fungi, plants, or animals and are chiefly unicellular or colonial. Protists that are multicellular do not have cells differentiated into tissues. The protists include the protozoans, certain algae, oomycetes, and slime molds.
Origin of protistFrom New Latin Prōtista, former kingdom name, from Greek prōtista, neuter pl. of prōtistos, the very first, superlative of prōtos, first; see per1 in Indo-European roots.
- (microbiology) Any of the eukaryotic unicellular organisms including protozoans, slime molds and some algae; historically grouped into the kingdom Protoctista.
- single celled eukaryotes + prokaryotes + sponges [to 1959]
- single-celled eukaryotes + prokaryotes [1959 - 1969]
- single celled eukaryotes [1969 - ]