protist

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.

Pertaining to the Protista, or having their characters.

Any member of the Protista.

One of the Protista.

Any of the eukaryotic unicellular organisms including protozoans, slime molds and some algae; historically grouped into the kingdom Protoctista.

free-living or colonial organisms with diverse nutritional and reproductive modes