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Webster 1913 Edition
Santonin
San′to-nin
,Noun.
[L.
herba santonica
, a kind of plant, fr. Santoni
a people of Aquitania; cf. Gr. [GREEK]: cf. F. santonine
.] (Chem.)
A white crystalline substance having a bitter taste, extracted from the buds of levant wormseed and used as an anthelmintic. It occassions a peculiar temporary color blindness, causing objects to appear as if seen through a yellow glass.