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- n. the theory that all living organisms are made of cells as the smallest functional unit
from the GNU version of the Collaborative International Dictionary of English
- n. See Cellular theory, under Cellular.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schleiden and by Theodor Schwann
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