celloidin

noun
cel·​loi·​din | \ se-ˈlȯi-dᵊn \

Definition of celloidin 

: a purified pyroxylin used chiefly in microscopy

First Known Use of celloidin

1883, in the meaning defined above

History and Etymology for celloidin

cellulose + -oid entry 1 + -in entry 1

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The first known use of celloidin was in 1883

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celloidin

noun
cel·​loi·​din | \ se-ˈlȯid-ᵊn \

Medical Definition of celloidin 

: a purified pyroxylin used chiefly in microscopy

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