Protist

Protists: An informal term used by biologists to describe a diverse group of eukaryotic organisms, not classifiable as animals, plants, or fungi — the three familar kingdoms of the domain, Eukarya, viz., Animalia, Plantae, and Fungi — formerly classified as a fourth kingdom of Eukarya, viz., Protista, but now, through the study of their phylogenetic evolutionary interrelations, classified into multiple kingdoms, at least seven, but possibly more as the evolutionary relationships remain under study.