cell doctrine cell division • cell family · · · Info · Definitions · Synonyms · Characters · · cell doctrine · · Text Common · · Latin · · Scripts 13 · · Length 3 · · Syllables Definitions · · · (noun) (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. Synonyms: cell theory, cell doctrine. · · Noun Definition 1 Synonyms · · · cell theory · · Synonym 1 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074