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nounany of the unicellular protiststype of:
Definition that contains protoctist
- kingdom the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
- chondrus a genus of protoctist
- gigartinaceae a family of protoctist
- genus porphyra a genus of protoctist
- family rhodymeniaceae a family of protoctist
- cryptophyta a phylum in the kingdom Protoctista
- protoctist order the order of protoctists
- slime mould a naked mass of protoplasm having characteristics of both plants and animals; sometimes classified as protoctists
- nummulitidae a family of fossil protoctists
- genus leucocytozoan a genus of protoctist