from Wiktionary, Creative Commons Attribution/Share-Alike License

  • 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

  • adj.
  • 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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