cell theory

noun
a basic tenet of modern biology, first stated by Matthias Schleiden and Theodor Schwann in 1838–39, that cells are the basic units of structure and function in living organisms.
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Example sentences
The cancer-stem-cell theory, though plausible, was based on animal experiments and its relevance to humans was untested.
Solar cell theory, cell manufacturing and how they are modeled mathematically are described.
One will be referred to as the convention cell theory and the other as the residual salinity theory.
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