The Collaborative International Dictionary of English v.0.48:
Multum \Mul"tum\, n.
An extract of quassia licorice, fraudulently used by brewers
in order to economize malt and hops. --Craig.
[1913 Webster]
Hard multum, a preparation made from Cocculus Indicus,
etc., used to impart an intoxicating quality to beer.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Cocculus Indicus \Coc"cu*lus In"di*cus\, n. [NL. cocculus (dim.
of L. coccum kermes berry) + L. Indicus of India.] (Bot.)
The fruit or berry of the Anamirta Cocculus, a climbing
plant of the East Indies. It is a poisonous narcotic and
stimulant.
[1913 Webster]