cell theory

noun

Definition of cell theory

: a theory in biology that includes one or both of the statements that the cell is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous cells with its properties being the sum of those of its cells

Examples of cell theory in a Sentence

Recent Examples on the Web Darwin’s theory of evolution by natural selection and the cell theory, the observation that organismic life consists of one or more cells, the atoms of biology. Christof Koch, Scientific American, 6 Oct. 2021 Long ago, cell theory was a new and revolutionary way to look more closely at life, and scientists moved animals to one group and plants to another based on the presence of the cellulose cell wall. Caroline Delbert, Popular Mechanics, 15 Nov. 2019 Interested in research more than treatment, Cajal turned to histology, or cell theory, a discipline that had flowered since the introduction of powerful microscopes in the 1830s. Cate Mcquaid, BostonGlobe.com, 6 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cell theory.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cell theory

1843, in the meaning defined above

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Time Traveler for cell theory

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The first known use of cell theory was in 1843

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Dictionary Entries Near cell theory

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Statistics for cell theory

Last Updated

17 Oct 2021

Cite this Entry

“Cell theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cell%20theory. Accessed 30 Nov. 2021.

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More Definitions for cell theory

cell theory

noun

Medical Definition of cell theory

: a theory in biology that includes one or both of the statements that the cell is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous cells with its properties being the sum of those of its cells

More from Merriam-Webster on cell theory

Britannica.com: Encyclopedia article about cell theory

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