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Protist is a collective name for any not belonging to the major multicellular clades of , or (usually) , and often treated as a formal kingdom Protista. Though protists are often described as "unicellular eukaryotes", some protists (such as many ) are multicellular. Some authors have suggested use of the terms "Protoctista" and "protoctist" rather than "protist" to remove the assumption of unicellularity. "Protist" is also often used interchangeably with "", though generally Protozoa are a smaller subgroup of protists. Attempts have been made to distingush between Protozoa ("first animals"), Protophyta ("first plants") and Protomycota ("first fungi") based mostly on nutritive modes, but the resulting frameworks have been entirely .
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