Dictionary.com
Thesaurus.com

unicellular

American  
[yoo-nuh-sel-yuh-ler] / ˌju nəˈsɛl jə lər /

adjective

  1. having or consisting of a single cell.


unicellular British  
/ ˌjuːnɪˈsɛljʊlə /

adjective

  1. (of organisms, such as protozoans and certain algae) consisting of a single cell

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

unicellular Scientific  
/ yo̅o̅′nĭ-sĕl′yə-lər /
  1. Having or consisting of a single cell.

  2. Compare multicellular


Other Word Forms


Etymology

Origin of unicellular

First recorded in 1855–60; uni- + cellular


Explanation

In biology, the adjective unicellular describes an organism that has only one single cell, like most kinds of bacteria. You're most likely to see the word unicellular in a biology textbook, where it is used to talk about microscopic, single-celled organisms. Many types of fungi are unicellular, as well as amoebas, bacteria, and other tiny creatures and plants. The word unicellular combines the Latin prefix meaning "one," uni, and the word cellular, which has the root word cella, "small room."

Keep Reading on Vocabulary.com

Vocabulary lists containing unicellular

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Yeast are unicellular fungi that ferment sugar into alcohol and carbon dioxide.

From Salon ● Sep. 4, 2024

To do this, the researchers surveyed Golgi structure in representatives of various animal taxa and closely related unicellular eukaryotes.

From Science Daily ● Feb. 29, 2024

For example, methane is the second-biggest driver of greenhouse gas emissions after carbon dioxide, but is largely produced by unicellular organisms called archaea.

From Science Daily ● Feb. 29, 2024

They are also astonishingly canny for unicellular organisms, with the ability to rapidly develop new defenses against antibiotics and then pass them along to other bacteria through genetic material.

From Los Angeles Times ● Jan. 3, 2024

Immortality, definition of, 82; of germ-cells, ix; of unicellular organisms, 17; of germ-cells, 80.

From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Oscar Hertwig

Random Word

Spin the wheel and learn a new word!

Get a word

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember new words for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com