Definitions

1. noun

any of the eukaryotic organisms that are not plants, animals, or fungi, including single-celled and multicellular organisms, and including bacteria are not protists, but protozoa, algae, and fungi are

“The biologist spent her entire career studying the diverse world of protists.”

2. noun

an organism that is not a plant, animal, or fungus and is typically eukaryotic

“Some protists are able to photosynthesize like plants, while others are heterotrophic.”