A protist (/ ˈproʊtɪst / PROH-tist) or protoctist is any eukaryotic organism that is not an animal, land plant, or fungus. Protists do not form a natural group, or clade, but are a paraphyletic group encompassing …

Apr 6, 2026 · Protist, any member of a group of diverse eukaryotic, predominantly unicellular microscopic organisms. They may share certain morphological and physiological characteristics with …

Feb 2, 2023 · Protists are the oldest eukaryotic microorganisms, having a nucleus and other membrane-bound organelles. Since they do not wholly fit into other groups like plants, animals, bacteria, or …

Jan 29, 2026 · ‘Protista’ is an English word taken from the Greek word “protistos”, which means “the very first”. These organisms are typically unicellular, and their cells have a nucleus that is attached to the …

Aug 5, 2025 · The term “protist” might sound like a placeholder—and in many ways, it is. It’s not a name for a single group of closely related organisms, but rather a convenient bin for everything that doesn’t …

Many different naming schemes were used over the last couple of centuries, but it has become the most common practice to refer to eukaryotes that are not land plants, animals, or fungi as protists.

The first is a phylogeny-based definition; that protists are all eukaryotes that are not animals, fungi, or land plants (Embryophyta). The second concept includes various definitions based on biological …