BSL Sign Language Dictionary
Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: (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
Sorry, no video found for this word.
Similiar / Same: cell doctrine
Categories: scientific theory
Do you know the sign for this?
Upload your sign now.