Definition of "one-celled" []

• Having a single cell (and thus not divided into cells) (adjective)

WordNet. Princeton University. 2010.

• "The second category is the protozoa, one-celled organisms like Giardia, which can cause acute or chronic diarrhea or can cause symptoms that are not ordinarily associated with parasitic infection like constipation, fatigue, dizziness, joint pain or hives."
• ""The book features many enlarged photographs of the one-celled organisms.""
• "In some ways politicians - and make no mistake, they're all politicians - are like one-celled organisms."