Microorganism

**Semantic type:** Organism

**Definition:** A microscopic organism. The term microorganism may refer to a prokaryote or eukaryote, and may be a unicellular or multicellular organism. All taxonomic kingdoms contain microorganisms.

**Synonyms:** - Micro-organism - Microbe - Microbe - Microbial - Microorganisms - Microorganisms, General - Single-Celled Organism - microorganism