Protozoans

Part of speech: noun

Definitions

1. Microscopic, single-celled organisms usually found in water that display both animal-like and plant-like characteristics
2. Unicellular, often mobile entities residing mostly in aquatic habitats, showcasing traits associated with both flora and fauna
3. Tiny single-celled lifeforms typically living in water that exhibit behaviors characteristic of animals

Etymology: "Protozoans" is the plural of "protozoan," and the word is a plain compound built from Greek parts. "Proto-" comes from Greek "prōtos," meaning "first," and "-zoan" comes from Greek "zōion," meaning "animal" or "living creature." Put together, the name means something like "first animals," a label for the simplest creatures that seemed to sit at the very beginning of the animal world. The formal scientific name "Protozoa" was constructed from these Greek roots, and English took it as a technical term, with "-an" added to form the singular noun "protozoan." The plural, "protozoans," is the ordinary English form for a countable noun, so it names a group of individual organisms.

Synonyms: unicellular organisms, microorganisms