noun (used with a plural verb) Biology.
Origin of Protista
Examples from the Web for protista
A seventh class of Protista is formed by the remarkable Slime-moulds (Myxomycetes).
Consciousness and the capability of will and thought are probably wanting in all Protista.
By this means our kingdom of Protista would be considerably increased.
Most of Protista are so small that they can scarcely, if at all, be perceived with the naked eye.
These interesting and important organisms are the primary creatures, or Protista.