\Tous`-les`-mois"\, n. [F., all the months, i.e.,
every month.]
A kind of starch with very large, oval, flattened grains,
often sold as arrowroot, and extensively used for
adulterating cocoa. It is made from the rootstocks of a
species of {Canna}, probably {C. edulis}, the tubers of which
are edible every month in the year.