Source : Webster's Revised Unabridged Dictionary (1913)

Quinoidine \Qui*noid"ine\, n. [Quinine + -oid.] (Med. (Chem.)
   A brownish resinous substance obtained as a by-product in the
   treatment of cinchona bark. It consists of a mixture of
   several alkaloids. [Written also {chinoidine}.]